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本文论述了科特数Pr=1的这种流动的研究成果。实验是在剪切流已充分发展,泰勒涡充分抑制的始发条件下在η=R_2/R_1=1.022的设备中进行的。第1次取得了覆盖整个不可压缩流范围(V_0=4.96～80m/s)的这种流动的定常的二维流场数据。实验证明:贴近动壁存在一厚度为δ/h=10/Re c_(f1)~(1/2),流速为1-μδ/V_0=(Reδ)~(1/2)·(c_(f1)~(1/2)=10 (c_(f1))~(1/2)的线性层,文中还提出了动壁面的阻力系数为c_(f1)=0.01/Re~(0.15)与断面平均流速公式v/V_0=0.89/Re~(0.214),以及经过修正后的对数圆周切线速度模型u/V_(max)=■/V_0In(h-αδ)/(y-αδ)。这个模型能准确地通过线性层端点(δ/h,uδ/V_0),平均流速点(y/h=0.368,■/V_0)与最大流速点(y/h=1,V_(max)/V_0=1)的坐标。
This article discusses the research results of this flow with the variability of Pr=1. The experiments were carried out in a device with η=R_2/R_1=1.022 under the conditions that the shear flow has been fully developed and the Taylor vortex is fully suppressed. In the first time, steady two-dimensional flow field data covering such a flow over the entire incompressible flow range (V_0=4.96 to 80 m/s) was acquired. Experiments show that: there is a thickness of δ/h=10/Re c_(f1)~(1/2) and the flow rate is 1-μδ/V_0=(Reδ)~(1/2)·(c_(f1 ) ~ (1/2) = 10 (c_(f1)) ~ (1/2) of the linear layer, the dynamic wall surface resistance coefficient is also proposed c_(f1) = 0.01 / Re ~ (0.15) and the average cross-section The flow rate formula v/V_0=0.89/Re~(0.214), and the modified logarithmic circumferential tangential velocity model u/V_(max)=■/V_0In(h-αδ)/(y−αδ). Accurately pass through the linear layer endpoints (δ/h, uδ/V_0), mean flow point (y/h=0.368, ■/V_0) and maximum flow point (y/h=1, V_(max)/V_0=1) coordinate of.