矩形通道内二维充分发展紊流流场的实验研究

EXPERIMENTAL STUDY OF TWO DIMENSIONAL FULLY DEVELOPED TURBULENT CHANNEL FLOW

一、前言 人们通过对紊流运动广泛深入的研究,提出了大量的紊流模型和预示紊流流场的数值方法。使用这些紊流模型对一般紊流流场进行数值预示时,先要对它们的可靠性作必要的考核和验证。考证的方祛可以是用它们预示一个“已知”的紊流流场,分析比较预示结果。“已知”紊流流场一般由实验获得,应具有较高的测量精度。二维充分发展紊流流场满足上述要求,常作为“已知”流场使用。

In this paper, Two dimensional fully developed channel flow is.measured carefully underthree different Re numbers with TSI1050 hot-wire anemometer. Data of pressure, mean velocity, flunctuation velocity and friction velocity are presented. FFT(CF-920) is used to analysis the measured results. Hot-wire calibrition and near-wall distance measurement problem are discussed either. Experimental results in this paper are in good agreement with paper[5]. Data in this paper can be used to verify turbulence models.