Investigation on flow turbulent characteristics of plate-fin and tube-fin heat exchanger

Fu Cheng; Zhao Bo; Xu Dachuan; Liao Daxiong; Pei Haitao; Zhu Bo; Qin Honggang

doi:10.11729/syltlx20190036

Volume 33 Issue 6

Dec. 2019

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Journal of Experiments in Fluid Mechanics > 2019 > 33(6): 22-27. > DOI: 10.11729/syltlx20190036

Fu Cheng, Zhao Bo, Xu Dachuan, Liao Daxiong, Pei Haitao, Zhu Bo, Qin Honggang. Investigation on flow turbulent characteristics of plate-fin and tube-fin heat exchanger[J]. Journal of Experiments in Fluid Mechanics, 2019, 33(6): 22-27. DOI: 10.11729/syltlx20190036

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Investigation on flow turbulent characteristics of plate-fin and tube-fin heat exchanger

Fu Cheng^{1, 2, ,},
Zhao Bo^{1, 2},
Xu Dachuan²,
Liao Daxiong^{1, 2},
Pei Haitao²,
Zhu Bo²,
Qin Honggang^{1, 2}

1.
State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China
2.
Facility Design and Instrumentation Institute of China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China

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Received Date: April 09, 2019
Revised Date: September 06, 2019

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Abstract

Abstract

In the continuous wind tunnel, the heat exchanger is installed upstream the test section to balance the heat which is generated by the fan or the compressor to control the total temperature in the test section. The heat exchange efficiency and the total pressure loose ratio are two important performance parameters of the heat exchanger in the wind tunnel. On the other hand, the flow dynamic characteristics such as the turbulence intensity and the noise of the heat exchanger can influence the flow dynamic quality of the wind tunnel significantly. In the 0.55 m×0.40 m low noise aeronautics acoustic wind tunnel, the hot wire is used to measure the velocity and the turbulence intensity distribution downstream the tube-fin heat exchanger and the plate-fin heat exchanger, and the total pressure loose ratio is also gained. The CFD method is used to simulate the flow structure and the self-turbulent intensity of these two types of heat exchangers. The study results show that the flow straightening characteristics of the tube-fin heat exchanger and the plate-fin heat exchanger have significant differences. The turbulent intensity and velocity uniformity downstream the tube-fin heat exchanger are better than that downstream the plate-fin heat exchanger, while the plate-fin heat exchanger has better straightening performance on horizontal turbulence. The self-turbulent intensity of the plate-fin heat exchanger is lower than the tube-fin heat exchanger. The investigation has important engineering application value for design of large scale continuous wind tunnels which have advanced flow quality requirements.
- wind tunnel,
- heat exchanger,
- turbulence intensity,
- flow quality,
- experiment,
- CFD

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