pressure ratio 中文意思是什麼
pressure ratio
解釋
壓比-
Even under the condition that the filling pressure was up to 1. 5mpa, the onset temperature was only 237 ?. with the filling nitrogen of 0. 9 mpa, the maximal pressure ratio reaches 1. 21 and the operation frequency is 25 hz. the ratio of the harmonic wave of the engine was very little and the frequency jumping was not found in present experiments
在充氣壓力為0 . 9mpa的條件下，該熱聲發動機最大壓比可達1 . 21 ，遠高於駐波型熱聲發動機，實驗結果和理論分析均表明系統的工作頻率為25hz左右，實驗裝置的諧波比例非常小，且也沒發現頻率跳變等現象。 -
According to a series of experimental data, the effect of following factors on the temperature in the ultra - low temperature box and cop are analyzed : the mixture composition, the pressure ratio and the return fluid extraction ratio of the rectifying column, the refrigeration capacity and the flow rate through throttle valve
並根據一系列實驗結果，分析了工質配比、循環壓比及精餾柱迴流液的抽取率、加熱量和節流元件對低溫箱內溫度和系統cop的影響，為今後的進一步研究指明了方向。 -
Contact pressure, hysteresis and no - even pressure ratio of no - gradual - enlargement finger seal under different length ratio and root circle of no - gradual - enlargement finger seal are constructed and analyzed, rules are summarized
本文對非漸擴形結構指尖密封在不同寬度比和根圓外徑下的接觸壓力、遲滯率及偏載率等特性進行了作圖、分析，得出了相應的規律。 -
Citing five - meter - high nanfei river rubber dam in hefei, one of the highest double - anchor water rubber dam in china as an example, while deeply analyzing some representative rubber dam projects in china, the article theoretically exploits the relationships among some technical parameters such as anti - pull intensity, internal pressure ratio, circum - oriented relative extending rate, etc. also has the author brought up his own opinion on rubber dam design & calculation theory, which is of high theoretical and applicative value for parameter optimization and combination of water rubber dam with a height of above 3. 5 meters. it also helps when building over - five - meter - high rubber dam using seamless rubber dam and rubber dam with steel wire as its frame. this article also exploits safety measures for designing & building rubber dam in navigation areas
本文以充水式雙錨固橡膠壩目前國內最高（壩高5m ）之一的合肥市南淝河橡膠壩工程為例，並在對全國目前已建橡膠壩代表工程進行深入分析的基礎上，對壩袋的抗拉強度、內壓比、環向相對伸長率等技術參數之間的關系進行了理論探討和研究，並對橡膠壩設計計算理論提出了自己的見解和看法，對指導設計壩高3 . 5m以上的充水式橡膠壩技術參數的優化組合具有重要的理論和應用價值，特別對應用無搭接縫橡膠壩、鋼絲網骨架橡膠壩建造壩高大於5m的橡膠壩具有指導意義。 -
Touch on developing large - flow and high - pressure ratio impressor and large - enthalpy drop turbine, reducing harmful emission, solving the major problems of high - temperature blade material, cooling, protective coating and single - grain blade casting, and comfirm some important manufacturing techniques
涉及了開發大流量高壓比壓氣機、大焓降渦輪，降低有害排放量，解決高溫葉片的材料、冷卻、保護塗層及單晶葉片鑄造等主要問題，並確認了一些關鍵的製造技術。 -
An optimizing method with constant pressure ratio is initially applied to the mixed refrigerant cycle. this method greatly simplifies the calculation of the cycle, and is helpful in numerical optimization of various cycles, especially in the complex cycles
本文首次採用混合工質製冷機循環的定運行壓比優化方法，大大減少了循環的計算量，為各種混合工質製冷機循環，尤其是復雜循環的數值優化奠定了基礎。 -
The mortar osmotic pressure ratio is highly 500 % and its water reducing ratio is only 9 %. concrete mixing with polycarboxylic acid type waterproofing agent holds excellent
試驗結果表明，多元羧酸系防水劑具有高的抗滲性，砂漿滲透壓力比高達500 % ，其減水率為9 % 。 -
Cfd is also used to get the data of performance parameters of the nozzle at different nozzle pressure ratio, different nozzle area ratio and different geometric defected angle. the theory of function approximation is used to establish the transient model of thrust vectoring with the data calculated
本文通過cfd計算獲得矢量噴管的性能參數，如流量系數、推力系數以及有效推力矢量角等與矢量噴管壓比、面積比以及幾何偏轉角之間的關系數據，並利用函數逼近理論建立了矢量噴管的動態數學模型。 -
Based on the detailed analysis of the computational results, the redesigning schemes are presented to reduce flow separation and increase pressure ratio and efficiency
在計算分析的基礎上提出減小流動分離、增加壓比和效率的改型方案。 -
In comparison with standing - wave heat engine, it has lower onset temperature and higher pressure ratio, which is of great significance for introducing a variety of energies of low quality into thermoacoustic engines, such as solar energy, waste vapor energy and so on
該熱聲發動機比純駐波型熱聲發動機具有更低的起振溫度、更大的壓比及更高的熱聲轉換效率。 -
Turbine pressure ratio
渦輪壓力比 -
In the first place, with the comparison among several sorts of configurations between the asu and gas turbine, ep - asu is theoretically proved to have better overall igcc power output, overall efficiency and net cost of power generation than lp - asu. furthermore, the pressure ratio of the asu and the temperature diffenrence of the main reboiler / condencer are found to be the two key factors which affect the power consumption by the asu
具體來說，本文首先通過對空分系統與燃氣輪機配置方案的深入研究和對比，從理論上說明了ep - asu與lp - asu相比能耗更低、投資更省、效率更高；並進一步得出空分壓比和空分系統的主冷溫差是影響空分系統能耗的關鍵性因素。 -
The study results show that the minimum ac flashover voltage decreases with the increase of the ice amount accreted on the insulator surface by an exponential law, and the down - trend of the minimum ac flashover voltage will slow gradually with the bridging of the shed of the insulators by icicles, both the average saturated ice amount and the special exponent m of effect of ice amount for different insulators depend on the radius of shed and the air - gaps of the sheds of the insulators, and that the ac ice flashover voltage decrease with the decrease pressure ratio p / p0 ( rise of the altitude ) by power - law for different esdd and icing - states when the altitude is from 4000m to 5500m. the special exponent n, which show the effects of altitude on the flashover voltage, is various with the type of insulator, icing - states and the surface status of iced insulator etc., and that the minimum ac flashover voltage of iced insulators decreases by power - law with esdd or the freezing water conductivity for different ice amount and atmospheric
研究結果表明：在不同海拔高度和等值鹽密esdd下，絕緣子的最低交流冰閃電壓均隨覆冰量的增加而呈指數規律降低；當覆冰量增加到一定程度后，最低交流冰閃電壓隨覆冰量增加而降低的趨勢趨于飽和；不同絕緣子串的平均飽和覆冰量及閃絡電壓的覆冰量影響特徵指數m均與絕緣子的盤徑和傘距等因素有關；在海拔4000 5500m之間，不同等值鹽密esdd和覆冰狀態下，絕緣子的交流冰閃電壓隨海拔高度的增加（氣壓的降低）與p / p0呈乘冪關系降低，氣壓影響特徵指數n與絕緣子類型、覆冰類型、覆冰表面狀況等因素有關；當覆冰量和氣壓一定時，絕緣子的最低冰閃電壓均隨著等值鹽密（ esdd ）或覆冰水電導率的增加而呈乘冪關系降低，並逐漸趨于飽和。 -
More than 200 different condition 3d viscosity steady flow fields in the thrust vectoring nozzle at different nozzle pressure ratio and different nozzle area ratio and different geometric defected angle is calculated by the program developed. and the related performance parameters are acquired by numerical simulation
利用該程序計算了某矢量噴管在不同的壓比、面積比和幾何偏轉角下的200多種三維有粘流場，獲得了矢量噴管的性能數據。 -
Two - order enhanced un - split finite volume euler method for multi - fluid flow, which combines the roe approximate riemann solver, is developed to simulate the multi - fluid interactions, such as the fluid described by polynomial eos, stiffen gas eos, jones - wilkins - lee ( jwl ) gaseous explosive eos, cochran - chan ( cc ) solid explosive eos and hom shock wave eos, etc. numerical results of the id, 2d and 3d multi - fluid interaction examples show that the high - resolution method and interface capturing equations can resolve the multi - fluid flow correctly and successfully. a simple fluid - mixture type ppm algorithm for multi - fluid flow, which is based on vof interface capturing method and resolved by langange / remap two steps, is developed to simulate the high density or high pressure ratio flow at both sides of the interface
本文提出了實用於多介質流體的增強型二階精度有限體積歐拉數值計算方法，採用roe方法近似求解riemann問題，可以適用於多項式狀態方程、 「 stiffengas 」狀態方程、 jones - wilkins - lee爆轟產物狀態方程、 cochran - chan固體炸藥狀態方程以及hom狀態方程等，並對多介質流體相互作用的一維、二維、三維問題進行數值計算，數值驗證了本文給出的高精度差分格式和界面捕捉方法的正確性，兩種方法耦合形成的多介質流體數值計算方法是成功的。 -
Sonic point position and critical pressure ratio in micro nozzles
微噴管內聲速點位置及臨界壓比 -
For rubber dam project is of simple structure and easy to operate, while having low requirement for the plate of the foundation, thus the key to rubber dam technology is the dam bag ' s anti - pull intensity, circum - oriented relative extending rate, internal pressure ratio, anchor structure as well as operation procedure
由於橡膠壩工程結構簡單、施工方便，對基礎底板的要求不高，因此橡膠壩技術的關鍵在於壩袋的抗拉強度、環向相對伸長率、內壓比、錨固結構型式，以及施工工藝等。 -
And the affect of nozzle pressure ratio, nozzle area ratio and geometric defected angle on the performance parameters is also investigated. 4
研究了影響矢量噴管性能的因素，研究了壓比、面積比以及幾何偏角對矢量噴管性能的影響。 -
This thesis gives a fundamental quantitative analysis of the cycle of recuperative gas turbine cogeneration with water injection and mainly discusses the influence of water injection ratio and pressure ratio on the specific power and the amount of heating
本論文對功熱並供回熱注水燃氣輪機熱力循環進行了基本定量分析。主要分析了注水率和壓比對比功和供熱量的影響。 -
To begin with, a brief introduction of gas - dynamic laser is given, and the formula for calculating the starting pressure ratio is derived
首先簡要介紹了氣動co2激光器的基本原理和工作過程，推導了激光器起動壓比的計算公式。
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