渦力率計 的英文怎麼說
中文拼音 [guōlìlǜjì]
渦力率計
英文
eddy current dynamometer-
The calculation result is compared with that of some experiments and other references, and it is satisfactory. the subroutines can be applied to the stress analysis of turbine disks in aeroengines
計算結果表明介面子程序具有在不同應變率條件下、應變率跳級拉伸條件下以及循環載荷條件下的模擬能力，程序正確、可靠，適于渦輪盤等發動機熱端部件的應力分析。The eddy current ring of pressure pipeline that is detected by spot probe is studied firstly in theory
摘要首先從理論上分析了放置式探頭探測壓力管道時的渦流環模型，然後應用此模型推導出了檢測時的特徵頻率計算公式。After simulating the model of water hydraulic valves, the velocity distribution, pressure distribution, energy distribution can be obtained and relations between the valve channel and the energy loss, the negative pressure distribution can be analyzed, which offers the theory foundation for designing water hydraulic valves with the high efficiency, low energy loss and low noise
通過對水壓閥模型的cfd穩態和瞬態解析，可以得到水壓閥內流場的速度分佈、壓力分佈及能量分佈，據此定性分析流道結構（速度、壓力、流動的分離與再附壁，旋渦的產生與消失等）與能量損失、負壓分佈等的關系，從而為設計出高效率、低能耗、低噪聲的水壓閥提供理論依據。The precondition of establishing mathematics model of torpedo turbine system in design condition is to fulfill the external conditions ( such as torpedo sailing speed and depth etc. ) and inner conditions ( such as turbine power and efficiency etc. ). after establishing mathematics model of torpedo turbine system in design condition, we compiled simulation program to compute all kinds of inner parameters of turbine engine include engine type, principal layout of turbine, inner structure of turbine and state parameters of gases
首先分析設計工況時渦輪機動力系統，在滿足魚雷動力系統的各項外部條件（如魚雷航深、航速等）和內部條件（如渦輪機功率、效率，燃燒室壓力、溫度，轉子機械強度等）的前提下，建立起設計工況渦輪發動機的數學模型，編程計算並確定渦輪機內部機械結構和燃氣熱力學狀態各參數。Based on prandtl ' s momentum transportation, this paper calculates in detail the physical quantities such as eddy viscosities, and ratio of eddy viscosity to motion viscosity, total stresses with respect to relative position in three regions of viscous sub - layer, buffer layer, and main turbulent stream for non - newtonian fluid flowing turbulently in ducts, which according to karman ' s three layer models and measurement of fluid parameters in evaluation apparatus, discusses the influence of polymer drag reduction on flowing properties of non - newton fluid, analyzes quantitatively principle of turbulent reduction phenomenon and condition of increasing reduction rate
摘要以普蘭德動量傳遞理論為基礎，按照卡門的三層模型，通過室內模擬環道用0號柴油及加入減阻劑在圓管內的流動參數的測定，計算了非牛頓型流體管內湍流邊界層的層流內層、過渡層、湍流中心的渦流粘度，渦流粘度與運動粘度比、總應力隨相對位置的變化等定量參數，探討了高分子減阻劑對非牛頓流體流動特性的影響，對湍流減阻現象的機理與增大減阻率的條件進行了定量分析。Refined grids were utilized in a large - eddy simulation model for obtaining high - resolution planetary boundary data and analyzing surface layer turbulence. simulation results showed that refined meshes reduced turbulent contributions of subgrid scales, sensitivity of simulation results to sgs parameters decreased, and features of the whole boundary layer were explicitly resolved better. results also revealed flux - profile relationship correctly in surface layer and a good agreement of turbulent velocity characters with observation. therefore, it concluded that the les method was able for simulation of surface layer flow and turbulence, and might be used for further applications
採用加密網格的大渦模式獲取邊界層風溫場的高解析度模擬結果，並據以分析近地面層大氣的湍流特性。結果表明，較小的網格尺度使次網格湍流貢獻率大為降低，模式計算結果對次網格參數的依賴性減小，邊界層整體特徵得到更好的反映。同時，模擬出的近地面層通量廓線關系及湍流速度特徵與實際觀測結果吻合甚好，表明模式具有反映近地面層平均運動和湍流特性的能力。Because vortex flowmeter has no movable mechanical parts, the output signal of it is a frequency signal that is proportional to flow signal, and it has less pressure loss, wider measurement range, it is used widely
由於渦街流量計具有無機械可動部件，可得到與流量成正比的頻率輸出信號，壓力損失較小和量程比較寬等優點，因而應用相當廣泛。Abstract : the paper introduces a new kind of vortex gas mass flowmeter, which can measure gas mass flow by testing the vortex frequency and the horizontal varying lifting force
文摘:介紹了一種利用檢測漩渦頻率和橫向變動升力的方法測量氣體質量流量的漩渦式氣體質量流量計。With the pressure measurement system for the swirl chamber diesel engine, by using the methods of equivalent power and the seven point three degree average for the indicator diagram, we can correct the tdc, smooth the pressure curve and make more accurate pressure data that is a well basis for the calculation of combustion heat release rate
摘要本文在自行開發的渦流室柴油機壓力數據測錄系統的基礎上，利用等效功法和七點三次加權移動平均法，分別對示功圖進行了上止點校正和壓力曲線光順，使壓力數據更精確，為燃燒放熱率的計算打下了良好的基礎。分享友人