氣動噪聲 的英文怎麼說
中文拼音 [qìdòngzàoshēng]
氣動噪聲
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Acoustics - measurement of airborne noise emitted by information technology and telecommunications equipment - amendment 1 : noise measurement specification for cd dvd - rom drives
聲學.信息技術設備和電信設備排放氣載噪聲的測量.修改件1 : cd cvd - rom驅動器的噪聲測量規范In chapter 5, the uh - 1 model rotor, the model rotor measured in the present work and the helicopter z - 8 rotor are taken as numerical examples, the calculations on rotor noise under different flight conditions are carried out for validation purposes
應用該模型，分別以uh - 1模型旋翼、本文試驗的模型旋翼以及z - 8直升機旋翼為算例，對不同飛行條件下的旋翼氣動噪聲進行了計算，驗證了本文的計算方法。Hydraulic pound, vibrate, noise and cavitation are the main difficult problems in water hydraulic valves, and finite element numerical analysis is proved to be an effective computational method, so numerical simulation and visualizing research on the flow field in water hydraulic valves by applying finite volume method is very important
水壓閥中的液壓沖擊、振動、噪聲以及水壓閥中的氣蝕是研製水壓閥存在的主要難題，而有限體積數值計算方法又被證實是一種可行而有效的流場計演算法，因此應用有限體積法對水壓閥閥道內流場進行數值模擬和可視化研究，是非常有意義，也是非常重要的。A new aerodynamic design system developed by authors for draft fan with enhanced efficiency, suppressed noise, enlarged flux and high load. the new design system features : a twist regulation for vortex control is employed in designing to lessen the secondary flow loss in the blade tip and hub ; the feasibility and high efficiency of this procedure has been verified by the tests of the prototype fan ; a new computer - aided 3d blading is used to optimize the blade ; numerical inverse checking is adopted to enhance accuracy in designing and cut down the period of the designing and production. this design system can make the optimized blade with " forward inclination ", " inclining sweep ", " bending sweep ", to minimize the various secondary flow losses, to expand the steady working range of the fan, and to suppress the aerodynamic noise source
本文通過對一種新型高性能礦用局部通風機的設計、製造及試驗全過程的綜述，展現了新的先進設計體系在民用通風機上的成功運用，其研製特點是： （ 1 ）在葉片氣動設計中為了降低葉根及葉尖區二次流損失，採用可控渦扭向規律設計，樣機實測的高性能驗證了這種方法的可行性和高效性； （ 2 ）在設計方法中採用較精確的數值反驗算，獲取最優設計方案，大大提高設計的準確性和成功率，並縮短了設計試制周期； （ 3 ）在設計過程中發展了計算機輔助三維葉片造型新方法，可以根據設計需要簡便快捷地對葉片進行「前傾」 、 「傾掠」或「彎掠」造型，這些造型對減小各種二次流損失、擴大穩定工況范圍和控制葉輪機氣動噪聲源起到了非常好的作用。Abstract : a new aerodynamic design system developed by authors for draft fan with enhanced efficiency, suppressed noise, enlarged flux and high load. the new design system features : a twist regulation for vortex control is employed in designing to lessen the secondary flow loss in the blade tip and hub ; the feasibility and high efficiency of this procedure has been verified by the tests of the prototype fan ; a new computer - aided 3d blading is used to optimize the blade ; numerical inverse checking is adopted to enhance accuracy in designing and cut down the period of the designing and production. this design system can make the optimized blade with " forward inclination ", " inclining sweep ", " bending sweep ", to minimize the various secondary flow losses, to expand the steady working range of the fan, and to suppress the aerodynamic noise source
文摘:本文通過對一種新型高性能礦用局部通風機的設計、製造及試驗全過程的綜述，展現了新的先進設計體系在民用通風機上的成功運用，其研製特點是： （ 1 ）在葉片氣動設計中為了降低葉根及葉尖區二次流損失，採用可控渦扭向規律設計，樣機實測的高性能驗證了這種方法的可行性和高效性； （ 2 ）在設計方法中採用較精確的數值反驗算，獲取最優設計方案，大大提高設計的準確性和成功率，並縮短了設計試制周期； （ 3 ）在設計過程中發展了計算機輔助三維葉片造型新方法，可以根據設計需要簡便快捷地對葉片進行「前傾」 、 「傾掠」或「彎掠」造型，這些造型對減小各種二次流損失、擴大穩定工況范圍和控制葉輪機氣動噪聲源起到了非常好的作用。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。Taking the near - field solution as the inputting data for aeroacoustic formulas, we solved the far filed hsi noise of rotors by several methods, which include farassat method solving fw - h ( ffowcs - william / hawkings ) equation, kirchhoff method solving general wave equation and a combined method ( k - fwh method )
噪聲計算以旋翼流動解為基礎，採用了氣動噪聲時域理論提供的三種預測方法，包括求解ffowcswilliams - hawkings方程的farassat方法、求解廣義波動方程的kirchhoff方法以及結合前兩種方法的k - fwh方法。Industrial - process control valves - part 8 - 3 : noise considerations ; control valve aerodynamic noise prediction method
工業過程式控制制閥.第8 - 3部分:噪聲的考慮.控制閥的氣動噪聲預測法Industrial - process control valves - part 8 - 3 : noise considerations - control valves aerodynamic noise prediction method
工業過程調節閥.第8部分:噪聲考慮因素.第3節:調節閥氣動噪聲預測法Experiment and prediction on aerodynamic sound of axial fans
軸流通風機氣動噪聲的實驗與預測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。A new method for predicting high - speed impulsive noise generated by a helicopter rotor
預測直升機旋翼氣動噪聲的新方法Industrial - process control valves - noise considerations - prediction of noise generated by hydrodynamic flow
工業過程式控制制閥.第8部分:噪聲.第4節.氣動噪聲預測Measurement of airborne noise from hydraulic fluid power systems and components - method of test for pumps
液壓動力系統和部件氣動噪聲測量.第1部分:液壓泵試驗方法Measurement of airborne noise from hydraulic fluid power systems and components - method of test for motors
液壓動力系統和部件氣動噪聲測量.第2部分:電動機試驗方法Industrial - process control valves - noise considerations - control valve aerodynamic noise prediction method - control valve aerodynamic noise prediction method
工業流程式控制制閥.噪聲.控制閥氣動噪聲預測法Industrial - process control valves - noise considerations - laboratory measurement of noise generated by hydrodynamic flow through control valves
工業過程式控制制閥.第8部分:噪聲.第2節:控制閥氣動噪聲實驗室測量3. we put forward a combine algorithm for predicting the aerodynamically generated noise using different methods mentioned above, and developed a computer code named " nospre " to predict acoustic noise generated by rotors 4
Nospre集成了三種噪聲預測方法，可採用固定或旋轉的聲源面來預測跨音速旋翼懸停和前飛時的氣動噪聲。分享友人