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Measurements of Dissipation Rate and Velocity/Pressure Gradient Correlation for Improvements to Gas Turbine Turbulent Flow Models

机译：用于改进燃气轮机湍流模型的耗散率和速度/压力梯度相关性的测量

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In this research program, a new comprehensive laser-Doppler velocimeter (CompLDV) experimental technique is being developed and used to measure precisely the instantaneous vector velocity, acceleration, and position of multiple particles within the Kolmogorov scales of high Reynolds number turbulent flows. With at least 4 particles at a given instant this results in the fine-spatial-resolution instantaneous measurement of the complete rate-of-strain and vorticity tensors and the dissipative and velocity fluctuation-pressure gradient fluctuation correlation terms in the Reynolds-averaged equations for complex three-dimensional turbulent flows, without employing any assumptions. Currently there is no other such experimental technique available and the information is important for improved turbulence modeling of complex 3- d flows like those in gas turbines and separated and vortical flows. Since this technique measures the instantaneous acceleration of the flow, the relationships between the instantaneous fluid acceleration and the velocity structure also are being examined in some detail for the first time. During this grant, this technique was used to obtain data for: (1) three-dimensional turbulent boundary layers and vortical and separated flows similar to those in gas turbines.

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作者
Simpson, R. L. ; Lowe, K. T. ; Orsi, E.;
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年度 2006
页码 1-14
总页数 14
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Gas turbines; Flow fields; Laser velocimeters; Pressure gradients; Turbulent flow; Walls; Boundary layer transition; Three dimensional flow; Flow separation; Free stream; Doppler systems; Vector analysis; Turbulent boundary layer; Vortices;

机译：燃气轮机;流场;激光测速仪;压力梯度;湍流;墙壁;边界层过渡;三维流动;流动分离;自由流;多普勒系统;矢量分析;湍流边界层;涡旋;

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专利

1. AN INTEGRATED PRESSURE-FLOW SENSOR FOR CORRELATION MEASUREMENTS IN TURBULENT GAS FLOWS [J] . Kalvesten E., Lofdahl L., Stemme G., Sensors and Actuators, A. Physical . 1996,第1a3期

机译：用于湍流流动相关测量的集成压力-流量传感器
2. Pressure–Rate-of-Strain, Pressure Diffusion, and Velocity–Pressure-Gradient Tensor Measurements in a Cavity Flow [J] . Liu Xiaofeng, Katz Joseph AIAA Journal . 2018,第10期

机译：腔流中的压力-应变率，压力扩散和速度-压力梯度张量测量
3. Velocity-temperature correlations in high-temperature supersonic turbulent channel flows for two gas models [J] . Zhang Junming, Chen Xiaoping, Li Yi Modern Physics Letters, B. Condensed Matter Physics, Statistical Physics, Applied Physics . 2019,第21期

机译：两种气体模型的高温超声波湍流通道流量中的速度温度相关性
4. An Integrated Pressure-flow Sensor For Correlation Measurements In Turbulent Gas Flows [C] . Kalvesten, E., Vieider, . 2001

机译：集成的压力流量传感器，用于湍流中的相关测量
5. Effects of pressure gradient on two-dimensional separated and reattached turbulent flows. [D] . Shah, Mohammad Khalid. 2009

机译：压力梯度对二维分离和重新附着的湍流的影响。
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Measurements of Dissipation Rate and Velocity/Pressure Gradient Correlation for Improvements to Gas Turbine Turbulent Flow Models

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