Pressure and Velocity Distributions in Pulsating Turbulent Pipe Flow Part 2 Experimental Investigations
Pressure and Velocity Distributions in Pulsating Turbulent Pipe Flow Part 2 Experimental Investigations
复制标题
脉动湍流管流中的压力和速度分布第 2 部分实验研究
DOI：
10.1299/jsme1958.19.951
复制
发表时间：
1976
期刊：
影响因子：
--
通讯作者：
M. Toyama
中科院分区：
文献类型：
--
作者：
M. Ohmi;T. Usui;Osami Tanaka;M. Toyama
用应变式压力传感器和热线风速计分别测量了旋转阀在圆管中产生的脉动湍流气流和水流的压力和速度(0.0432<；=f<；=48.0 Hz，7740<；=Re<；=95900)。实验数据与含弱可压缩流体的圆管内脉动湍流四区模型近似解的比较表明：(1)时间平均速度的横截面分布与定常流动速度的横截面分布符合得很好。(Ii)振荡速度的截面分布与上述理论分布吻合较好，因此仅依赖于雷诺数和无量纲角频率w‘=R2w/v，其中R为管道半径、w角频率、v运动粘度。(3)在0.1<；=f<；=48.0赫兹的频率范围内，管轴上的振动压力和速度的轴向分布也与上述理论符合得很好。
Pressure and velocity of pulsating turbulent air and water flows in circular pipes generated by rotary valves were measured by the use of a strain-gauge-type pressure transducer and a hot-wire anemometer, respectively (0.0432 <= f <= 48.0 Hz, 7740 <= Re <= 95900). Comparisons of experimental data with approximate solutions derived from a four-region model for a pulsating turbulent flow in a circular pipe containing a slightly compressible fluid show that : (i) Cross-sectional distribution of time-averaged velocities agrees well with that of steady flow velocities. (ii) Cross-sectional distribution profiles of oscillating velocity coincide well with the above-mentioned theoretical ones, and therefore, depend only on the Reynolds number and the dimensionless angular frequency w'=R2w/v, where R is pipe radius, w angular frequency, v kinematic viscosity. (iii) Axial distributions of oscillating pressures and velocities on the pipe axis also agree well with the above-mentioned theoretical ones within the frequency range of 0.1 <= f <=48.0 Hz.