氣體動力噪聲 的英文怎麼說
中文拼音 [qìtǐdònglìzàoshēng]
氣體動力噪聲
英文
aerodynamic noise-
Hydraulic fluid power - test code for determination of airborne noise levels - part 3 : pumps - method using a parallelepiped microphone array
液壓流體動力.氣載噪聲級測定的試驗規程.第3部分:泵.採用平行六面體麥克風排列法Measurement of airborne noise from hydraulic fluid power systems and components - method of test for pumps using a parallelepiped microphone array
液壓動力系統和部件氣動噪聲測量.第6部分:平行六面體傳聲器陣列測試液壓泵噪聲Abstract : on the basis of the analysis about noise sources of the air compressor, it shows that air dynamic noise is primary one. according to the theory of fluid mechanics, the mathematics model of the air compreesor air dynamic noise is found, which shows the relationship between the sound power level and other parameters. the knowing noise of the air compressor " s air dynamic is of low frequencies. the reliable data is provided for the noise and vibration control
文摘:通過對空壓機噪聲源的分析，確認空壓機噪聲源中的空氣動力性噪聲為最強；由流體流場的聲學理論，建立空壓機動力性噪聲源的力學模型，它表明聲功率與其它參數的關系；並知空壓機的空氣動力性噪聲呈低頻特性，這為噪聲及振動控制提供了可靠的依據More often than not the combustion noise refers to the noise radiated from the cylinder cap, piston, rod, crankshaft to the engine body propelled by the pressure vibration generated out of the combustion inside the cylinder
燃燒噪聲和機械噪聲很難嚴格區分，通常將由於氣缸內燃燒所形成的壓力振動通過缸蓋、活塞-連桿-曲軸-機體向外輻射的噪聲稱之為燃燒噪聲。On the basis of analyzing the aerodynamical property and the construction of usual axial fan, the aerodynamical property and the construction of contra - rotating axial local fan are studied in the paper. moreover, author has designed a kind of contra - rotating local fan, which has the characters of low noise, high efficiency, well aerodynamical performance, optimum structure, and large power
本文在分析了普通軸流式通風機的氣動力特徵和結構的基礎上，研究了對旋式軸流通風機的氣動力特性和結構特點，設計並製造出了一種風量大，風壓高，噪聲低，效率高，氣動性能好，體積小，結構新穎的2 30kw新型大功率對旋式軸流局部通風機樣機。The former one is a product of the pressure pulsation resulting from the fan blade periodically cutting the air, with the blade passing frequency as its base frequency and accompanied by higher harmonics. the wide - band turbulent noise is formed when the rotating fan forces the surrounding air to produce turbulent throw - outs and results in gas thickening and thinning processes
旋轉噪聲是由於風扇的葉片周期性地切割空氣，引起空氣的壓力脈動產生的，以葉片通過頻率為基頻，並伴有高次諧波。湍流噪聲是由於風扇運動導致的周圍空氣發生湍流脫體，使空氣發生擾動，形成氣體的壓縮與稀疏過程而形成的，是一個寬頻帶噪聲。Combining cfd technology and aeroacoustic theory in time domain, the high - speed impulsive ( hsi ) noise of helicopter rotor in hover and in forward flight was predicted and investigated
本文結合cfd （計算流體力學）技術與氣動噪聲時域理論，求解直升機旋翼懸停和前飛流場及流場氣動噪聲。How expounded testing and controlling seven variables such as temperature, humidity, stress, oxygen, carbon dioxide, vibration and noise etc. it is different from single variable environment simulate hermetic cabin before, this paper expounded the basic component of multi - variable environment simulation hermetic cabin and the work principle of measurement and control system to develop of it, it advanced the method of the preset checkout and the jointly control of multi - variable such as temperature, humidity, stress, oxygen, carbon dioxide, vibration and noise etc, it has been designed to realize computer measurement and control of environment simulate hermetic cabin
具體介紹了多變量環境模擬密封艙的基本組成和測控系統的工作原理，闡述了如何對所給定的溫度、濕度、壓力、氧氣濃度、 co _ 2濃度、振動和噪聲等七種變量進行檢測和控制。與以往單一變量環境模擬密封艙不同的是，本文對所研製的多變量環境模擬密封艙的基本組成和測控系統的工作原理進行了闡述，提出了對所給定的溫度、濕度、壓力、氧氣濃度、 co _ 2濃度、振動和噪聲等多種變量的檢測和聯合控制的方法，設計並實現了環境模擬密封艙的計算機測控。It will exert resistance and damping force to the torque motor armature, so that the dynamic performance, especially the stability, of flapper - nozzle servo - valve can be improved. the self - excited oscillations and noise can be removed. at the same time, as magnetic fluid has a higher magnetic permeability, the efficiency of torque motor magnetic circuit can be improved
由於磁流體具有的較大磁導率和較大的磁化強度，把磁流體添加到伺服閥力矩馬達的工作氣隙中，可提高伺服閥力矩馬達的磁迴路效率，增加伺服閥的阻尼，從而改善噴嘴擋板伺服閥的動態特性，抑制及消除其自激振蕩和噪聲。This paper aimed at the low noise aerodynamic performance of automobile cooling fan, set out from the fluid dynamics and the mechanism of noise generation and radiation, mathematical model has been erected to analyze the influence of the main structural parameters on noise performance
本文著眼于汽車冷卻風扇的低噪聲氣動性能，從汽車冷卻風扇的流體動力學理論和氣動噪聲的產生機理出發，建立數學模型，分析風扇主要結構參數對冷卻風扇噪聲性能的影響。The aerodynamic noise is a product of the unstable gaseous process. in one word, it comes from the disturbance of gases and the interaction between gas and objects
1空氣動力噪聲空氣動力噪聲是由於氣體的非穩定過程，即由氣體的擾動以及氣體與物體的相互作用而產生的。分享友人