等徑程發動機 的英文怎麼說
中文拼音 [děngjìngchéngfādòngjī]
等徑程發動機
英文
square engine-
Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece
將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義In this thesis hydraulic experimental studies and theoretical analyses on the vortex - flow drop shaft were conduced and the following results were accomplished : ( 1 ) in the model test some hydraulic characteristics including the shape of air core in the center of the drop shaft, the radial distribution of water flow velocity and the distribution of pressure on the wall of the drop shaft were measured under the condition of high water head above 250m and large discharge above 1400m3 / s. ( 2 ) a kind of computational method for the spiral water flow in the air core region of drop shaft was discussed and applied and the results agree the experimental data well. ( 3 ) the total ratio of energy dissipation in the drop shaft can reach 90 % and the energy dissipation in every region was discussed quantitatively
本文通過試驗研究與理論分析對旋流式豎井泄洪洞應用於高水頭、大泄流量情況時存在的一些水力學問題進行了研究和探討，取得以下主要成果：一、結合小灣工程導流洞改建，對高水頭（ 252m ） 、大泄流量（ 1400m ~ 3 s ）條件下旋流式豎井中的水流運動特徵進行了比較全面的測量，包括空腔形態、徑向流速分佈及井壁壓強等；二、提出了豎井空腔段螺旋水流水力計算方法，其計算結果與實測值吻合良好；三、利用試驗與計算結果，對旋流式豎井的消能機理進行了探討，對豎井各部分的消能能力有了總體認識；四、對豎井下部消力井的合理井深進行了優化試驗研究，發現消力井合理深度為0 . 9d左右；五、通過試驗研究，歸納出豎井水流總摻氣量估算方法，為導流洞排氣方案的設計提供了參考依據；六、在高水頭、大流量條件下，豎井空腔段下部流速很高，盡管水流螺旋運動引起的離心力可以確保井壁壓強保持正壓，但空化數依然較低，因此豎井的空化空蝕始終是工程界關注的重大問題。Them, the thesis has chosen three china ' s cases as object of study, corporatism and social resource theory as theoretical perspective, and the function of npo integrating social welfare resources as the point of study to research the mechanism of npo integrating social welfare resources, the factors which bring down its effects, the motive power of the development of npo in social welfare field. then, the conclusion comes into being : the instituting and running of a npo which has specific object is a effective mechanism to integrate social welfare resources ; in practice, npo can integrate social welfare resources by instituting former and informer social network ; the factors which bring down its effects include policy and themselves ; and there is several kind of power which can motive the development of npo in social welfare field
本文選取了在發展程度上呈梯次性的中國三個個案為研究對象，以合作主義和社會資源理論為理論視角，以非營利組織對社會福利資源的整合功能為切入點，探討了非營利組織整合社會福利資源的機制、其效果的制約性因素、以及在社會福利領域推動非營利組織發展的動力，認為定位明確的非營利組織的成立與運營為社會福利資源的整合提供了一條可供選擇的有效的途徑，發現在實踐中非營利組織可利用正式的和非正式的兩種網路建構來開發整合社會福利資源，而現階段其整合效果受到政策環境和自身能力等因素的制約，推動非營利組織發展與能力健全的力量源泉主要來自需求推動、政策推動、專業知識推動和國際交往推動。Assembly model of the pro / engineer cad / cam does not support the interference check of assembly path and process. to resolve this problem, this paper put forward a method which directly takes advantage of the eigen functions of pro / engineer. that is : planning path and simulating dynamically under skeleton, setting interference conditions and simulation degree under relation of pro / program, realizing the interference check with the man - machine interchange
本文從裝配的概念及發展現狀、裝配模型的建立、裝配的評價體系等系統地闡述了產品虛擬裝配的過程和重要性，並對虛擬裝配的操作平臺pro engineer作了一個簡單的介紹，針對pro engineercad cam軟體assembly模塊中不能體現裝配路徑及過程干涉的問題，提出了在組合件的skeleton下規劃裝配路徑和動態模擬、在pro program的relation下設定干涉條件和模擬程度、以及通過人機交互解決干涉的方法。The main achievements are as follows : 1 it ' s for the first time to extensively investigate effects of main combustion system parameters such as plunger diameter, plunger stroke, fuel delivery advanced angle, valve opening pressure of nozzle on performance of dme engine. the parameters are optimized
取得的主要成果有： 1系統地研究了油泵柱塞直徑和行程、供油提前角、噴嘴啟噴壓力等發動機燃燒系統主要參數對二甲醚發動機性能的影響，優化了這些參數。This text completely and systematically studies the status and the development of the pyrolysis and the fluidization of biomass, which distill the bio - oil in the domestic and international area, as well as the existing problems. this thesis primarily include following aspects : ( l ), by experimenting and measuring the energy ( heat value ) and the content of c, h, n chemical element of right 20 kinds of common biomass, on the base of the experimental result, and respectively established the biomass energy predict experiment formula with the element of h and c is from change, and passed the ro. os examination, which provides the basis and convenience for flash pyrolysis fluidization device energy to convert the rate to compute with biomass energy utilization calculation ; ( 2 ), proceeded the tg and dtg experimentation equal velocity ( 10 ? / min, 20 ? / min, 40 ? / min, 60 ? / min ) heating and constant temperature heating by studying on eight kinds of biomass samples, according to the experimental data and arrhenius formula, we established the dynamics model of pyrolysis of, then, using the goast - redfern and p function, we also solved the dynamics parameters and analyze out every kind of biomass ' s frequency factor and parameters of activation energy, and established the every kind of dynamics model of pyrolysis of biomass, all of these provide the theories and basis to make sure the reactor ' s flash pyrolysis work temperature scope design and the describing of pyrolysis reactor dynamics ; ( 3 ), in order to study and ascertain the process of heat completely getting to pyrolysis time of varied size biomass particles, we observed and measured the ratio of length and diameter ( l / d ) with the varied biomass through electron microscope, we concluded the l / d ratios usually is from 5. 0 to 6. 0, the average is 5. 3 ; ( 4 ), we studied the process of biomass transiting and the theory of complete pyrolysis time with the theory of complicated heat field, we got the time ( t ) of the varied size biomass particles arriving to complete pyrolysis, and we knew that the complete pyrolysis time and the time which get to the biggest production ratio are identical, all of these studies provide the theory base for design and forecasting the flash pyrolysis reactor solid state resort time ; ( 5 ), according to the above experiment result, synthesize to make use of the engineering the mechanics, engineering the material, machine the design to learn the principle, deduce, establish the theory of rotation cone flash pyrolysis reactor material resort time ( t ) and reasonable rotation velocity ( or frequency ) relation theory ; and ( 6 ), we gave the reactor ' s smallest cone angle certain, reactor cone wall strength design theory, the reactor production ability theory, the power design method and the critical rotation velocity theory
本文較全面、系統地綜述了國內外生物質熱解液化制取生物燃油技術研究發展現狀及存在的問題，主要研究內容有： （ 1 ）實驗、測定了20種常見生物質的能量（發熱量）和c 、 h 、 n元素含量，根據實驗結果分別建立了以h和c為自變量的生物質能量預測經驗公式，並通過r _ （ 0 . 05 ）檢驗；為閃速熱解液化裝置能量轉化率計算和生物質能量利用率計算提供了依據和方便； （ 2 ）選擇了8種生物質試樣作了等加熱速率（ 10 min 、 20 min 、 40 min 、 60 min ）和恆溫加熱的tg和dtg實驗，根據實驗數據和阿倫尼烏斯公式建立了生物質熱解反應動力學微分方程，並採用goast - redfem積分法和p函數對其動力學參數進行了求解，解析出各種生物質的頻率因子和活化能參數，進而建立了各種生物質的熱解動力學模型，為科學確定反應器的閃速熱解工作溫度范圍及熱解反應動力學描述，提供了理論和依據； （ 3 ）為研究和確定不同尺度的生物質顆粒中心達到全熱解的時間，在體視顯微鏡下對不同粒度的生物質顆粒的長徑比進行了實驗觀察和測定，得出生物質的長徑比（ l d ）一般在5 . 0 6 . 0之間，平均為5 . 3的結果； （ 4 ）採用復雜溫度場傳熱學理論對生物質傳熱過程及充分熱解時間理論進行了研究，解析推導出了不同尺寸生物質顆粒中心溫度達到充分熱解溫度的時間（ t ） ，得出了理論推導的充分熱解時間與最大產油率的熱解時間相一致的結果，為閃速熱解反應器固相滯留時間設計和預測提供了理論依據； （ 5 ）根據上述實驗結果，綜合運用工程力學、工程材料、機械設計學原理，推導、建立了轉錐式閃速熱解反應器物料滯留時間（ ）與轉速（或頻率）合理匹配理論； （ 6 ）提出了轉錐式閃速熱解反應器的最小錐角設計、錐壁強度設計、生產能力設計理論和功率計算方法及臨界轉速理論等。Bionic of architecture out - look pay attention to the enlightenment of beauty of nature bring to mankind ; bionic of architecture structure pass to undergo special composition structure of organism of natural selection - for instance the research of the stem pole of the fiber, plant, skeleton of the animal, etc., and apply them to the structure design of architecture, it is an important way to structure innovates ; bionic of architecture function pay attention to studying the characteristic of organic unity " of the organism, through function imitation of nature such as metabolism and nervous system, etc. we get many useful ideal to urban and architecture development ; the bionic of utilize of energy and material through understanding the organism utilizes energy and material method in depth, combine with physics, chemistry, electron, etc, every achievement of discipline create new energy and material utilizing way
建築造型仿生注重自然形態美帶給人類在建築形態創造方面的啟示；建築結構仿生通過對經過自然選擇的生物體的特殊構成結構? ?如纖維、植物的莖桿、動物的骨骼等的研究，運用到建築結構設計中，是結構創新的重要途徑；建築功能仿生注重研究生物體的「有機統一性」特點，通過對生物體內部機能如新陳代謝和神經系統等方面的模仿來組織建築功能或指導建築和城市及其環境的發展；建築的能源和材料利用仿生則通過深入了解生物體利用能源和材料的方法和過程，並結合物理、化學、電子等各學科的成果創造出新的能源和材料利用方式。Aim : to analyze the mechanism, thermadynamic theoretical basis, dynamic mechanism and influencing factors of thermally induced phase separation ( tips ) in order to completely grasp the factors affecting the size, distribution and form of pores, so that the adjusted range of pore can be widened and the preparation of porous membrane can be repeated and controlled. methods : considering from the structural characteristics of tissue engineered materials, the methods of preparing porous membrane using tips technique, the hermadynamic theoretical basis, dynamic mechanism and influencing factors were analyzed, the problems and investigative directions in the future were also analyzed. tips technique is a process of phase separation of polymer homogenous solution under quenching, and it is suitable for diameter and structural form of the micropore materials prepared using tips are closely correlated with the kind and dispensing proportion of polymer attrnuant, polymer concentration and polymer molecular mass, etc. conducted, including determination of polymer - solvent system phase diagram, study of form and appearance of porous membrane of different thickness, study of form and appearance of porous membrane prepared with systems of different x, which is the parameter of polymer - solvent interaction
目的:分析熱致相分離成膜過程的機理、熱力學理論基礎、動力學機制以及影響因素，以便充分掌握影響孔度大小、分佈、形態的因素，使孔度調控范圍得以拓寬，使多孔膜的制備能重復可控.方法:從組織工程材料結構特點出發，分析熱致相分離聚合物多孔膜的制備方法及該法成膜的熱力學理論基礎、動力學機制以及影響因素.並分析實驗中存在的問題及今後的研究方向.結果:以熱致相分離法可制備聚合物多孔膜.熱致相分離法制備多孔膜是高聚物均相溶液在淬冷條件下發生相分離的過程，它適用於上臨界共溶溫度型聚合物一稀釋劑二元體系.熱致相分離法成膜的過程，可以認為是旋節線機理佔主導地位.熱致相分離法制備的微孔材料，其孔隙率、孔徑大小、結構形態與聚合物稀釋劑的種類、組成配比、聚合物濃度、聚合物分子量等因素密切相關.結論:可採用熱致相分離技術制備多孔膜，通過改變不同的成膜條件可獲得一系列不同孔徑尺寸和孔徑分佈的多孔膜材料.對熱致相分離成膜過程中聚合物-溶劑體系的相圖測定，不同厚度的多孔膜形貌研究，不同x （聚合物-溶劑相互作用參數）體系所制備的多孔膜形貌等需深人研究This paper introduces the development and present situation of vibration absorb technology in the world ; generally analysis the rubber - bearing ( rb ) and lrb " s operative mechanism, function and the calculation of parameter ; advance the concept of standardization to lrb ; on the basis of generally analyzing the connected factor such as the site category, the diameter of lead bar, the height of bearing, the designing carrying capacity, the span of bridge, the inherent period and the displacement of rb, determine the parameter, the absorbing vibration target, the method and the process of standardization to lrb ; then according to the two - step rule of resisting and defending earthquake, and combining with the response spectrum theory in the seismic vibration of bridge, make a lot of calculation and analysis of vibration absorb design to the real bridge collected and combined by finite element program ; at last, gives the result of standardization through diagram and explains to its usage
本論文介紹了國內外減震技術的發展和現狀；綜合分析了普通板式橡膠支座和鉛銷橡膠支座的工作機理、性能及參數的計算；提出了鉛銷橡膠支座標準化的概念；在綜合分析場地土、鉛銷直徑、支座高度、設計承載力、橋梁跨徑、固有周期以及支座變位等影響因素的基礎上，確定了鉛銷橡膠支座標準化的參數、減震目標、方法和過程；並根據抗震設防兩階段原則，結合橋梁地震振動理論的反應譜法，運用有限元程序對收集和組合的實橋進行了大量減震設計的計算和分析；最後以圖表的形式給出了鉛銷橡膠支座標準化的結果，並說明了其使用方法。With the data recorded by computer, the author studies the experiment progress in detail, which includes the development of pore press, strain, strength of the sand, etc. connecting the development of these phenomena with the development of stress path, the author finds new mechanism which can explain the phenomena in the experiment. what is more, according to the dynamic test of the sand, there appears a steady state at the last phase of the development of strain and stress path, in which the strength of the sand is studied because it is an important parameter in evaluating the stability of sand against liquefaction. secondly, the dynamic constitutive relation was studied through the dynamic tri - axial test
本文首先採用目前國內較先進的微機控制動三軸儀，利用其可以適時採集和儲存數據的優勢，對砂土的實驗過程進行了細致的分析，研究該過程中孔隙水壓力發展、軸向應變發展以及它們與應力路徑之間的關系，對飽和砂土的剪脹、剪縮和卸載體縮等多個方面進行了研究，探索了砂土的動力特性，分析了影響砂土抗剪強度的各種因素，這些因素既包括土本身的特性（土的密度、結構、級配、透水性以及初始狀態等） ，又包括動荷載的特徵（振動力幅值大小和振動頻率等） 。The working stress state and the stability of typical blocks of baise rcc gravity dam are computed and studied based on the 3d non - linear finite element method ( fem ) and rigid body - spring element method ( rbsm ). the analysis of failure process, failure mode, failure mechanism of the dam are studied with overload method and combined method in which rock strength parameters are decreased while water load is overloaded to a certain degree. in this paper, the following works are done
本文充分發揮有限單元法和剛體彈簧元法的優點，對百色rcc重力壩典型壩段（ 9b 、 4b ）地基穩定安全性進行數值分析和計算，從超載法、綜合法等不同角度，對壩基穩定性開展研究，分析壩體和壩基破壞過程、破壞形態和破壞機理，確定壩基可能的滑動路徑和滑移模式，評價工程的穩定安全性。The main goal is to show the whole assembly process of the product by means of visualization, to test the assembly capability by means of assembly sequence and path planning via interaction of human and computer, assembly collision detecting and so on, automatically generating the assembly path, so can obtain information feedback for product redesign. as a result, shortening the cycle of product design. in this project, the most important feature of this work is it has a better universal character, it means that it can be used on any model, and we also can adjust the path process of simulation and angel of view at well
本文所完成的另一主要工作是研究通用裝配模擬，裝配路徑，裝配工藝及其相關方面的問題，其目的是為了以可視化的方式將產品裝配體的整個裝配過程展現在設計者面前，並通過裝配模擬問題研究過程中的人機互動式的裝配序列與路徑規劃、裝配碰撞干涉檢驗等手段讓設計者能夠快速檢驗產品裝配體的裝配性能，自動生成裝配路線，並能夠根據產品裝配性能的信息反饋，進行產品再設計，從而縮短產品的開發周期。This thesis gives a brief introduction to basic theory of wind power, construction of wind farm and commissioning and operation of wind turbine by illustrating the 3rd phase extension project of ningxia electric power group co., ltd helanshan wind fram. based on the specific study on the engineering construction and the domestically and globally popular 850kw wtg, further by comparasion of the power output rate of g52 and g58, we can prove that with substitute of new material and new technology, larger capacity wtg will become popular. especially when the running diameter of blades enlarged, more power produced at same wind speed ; and the high efficiency will be further guaranteed if the gearbox, major shafting equipment be checked and maintained regularly
根據對實際工程建設的具體研究，對我國及國際上主導機型850kw風機的具體分析，以及對g52和g58風機輸出功率的比較，更進一步證明在新的技術和材料替代下，更大型的風力發電機組將會替代現有主導風機機型，特別是在風機葉輪轉動直徑增大后，相應的輸出功率在同等風速下會有明顯增加，更好的利用風能並轉變為電能;齒輪箱作為風機中主要傳動設備，只有按維護要求並根據實踐經驗定期檢查易損部件，才能使風機安全高效的運行，提高風機的經濟運營效率。The influence of parameters such as mass flow, input power, and constrictor size on arcjet performance is also analyzed. this work provides an experimental foundation for the numerical simulation study and optimized design of arcjet. a high - speed, high - resolution, multi - line spectroscopic diagnostic system has been improved to diagnostic the excitation temperature of arcjet plume
本文優化並改進了一套高速、高精度的多譜線電弧等離子體光譜診斷系統，使其適用於電弧加熱發動機羽流激發溫度的診斷，並利用該系統診斷了發動機出口羽流的非平衡程度和溫度沿徑向的分佈。This subject, which regards innovative experiment as the core, uses experimental activity as the means, takes the theory and modern information technology as the foundation, have probed the innovative method and means in the physics experiment teaching of the middle school and combined the reality of nan yang middle school of shanghai. ( 1 ) we have processed creative development with campus scientific and technological beauty spots and classroom instruction experiment of middle school of nan yang, and has studied the education function of the science and technology environment of campus and classroom instruction mode based on science and technology environment of campus, which will form radiation function on the student " s education of science and technology ; ( 2 ) we have practised the activity and launches relatively deep research to the innovative experiment, and led students to carried on eastern green boat new energy science and technology activities, innovative performance activity and innovative match, etc. we have made the remarkable effect ; ( 3 ) we have carried on some exploration to the innovative experiment course, formed the innovative experiment course based on the single chip micyoco and figure process system tentatively over one year, and have carried on the teaching practice of the innovative experiment course in four experiment classes
本課題以中學物理創新實驗為核心，以實驗實踐活動為途徑，以先進教育理念和現代信息技術為基礎，探索了中學物理實驗教學中的創新方法和手段，並結合上海市南洋中學實際情況（ 1 ）對南洋中學校園科技景點和課堂教學實驗進行了創造性的開發，並研究了校園科技環境的教育功能和基於校園科技環境的課堂教學模式，以及對學生科技教育形成的輻射作用； （ 2 ）對創新實驗實踐活動展開比較深入的研究，先後帶領學生進行了東方綠舟新能源科技考察活動、創新表演和創新大賽等活動，並取得了顯著成效； （ 3 ）對創新實驗課程進行了一些探索，一年來初步形成了單片機和圖形處理系統為基礎的創新實驗課程，並對四個實驗班進行了創新實驗課程的教學實踐。The author thinks these views are the combination of the attitudes to, the relatively stable idea and the basic instruction of job selection, formed in the process of learning and practicing by students themselves, contemporary, subj ective, and various. the views mainly include the ideal aim, motivation, relev ant knowledge, value inclination, and ways of realizing ; the views affect in c onducting the goals to job selection, constructing knowledge structure, sorting out useful knowledge, adjusting behavior, regulating professional morality, and prompting profession adaptation. there is a law in the formation and develop ment of these views
筆者認為，大學生擇業觀是在校大學生，在讀書學習和社會實踐過程中形成的，對如何選擇職業這一實踐活動的較穩定的認識、態度和基本的指導思想，具有時代性、主體性和差異性的特點；大學生擇業觀主要包括擇業理想目標、擇業心理動機、擇業認知狀況、擇業價值取向、擇業實現途徑等五個方面;大學生擇業觀的作用表現在指導擇業目標、建構知識結構、過濾擇業認知、調整擇業行為、規范職業道德、促進職業適應等方面;大學生擇業觀的產生、形成、發展過程遵循一定的客觀規律性。分享友人