Study of thermal efficiency of a wall gas jet blown through the holes in the transverse trench

We present the experimental results on the thermal efficiency in a wall gas jet blown through inclined cylindrical holes along a smooth surface, and when a secondary flow is blown through cylindrical holes into a transverse trench. The thermal efficiency fields of the wall jet were measured using an...

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Bibliographic Details
Published in:Thermophysics and aeromechanics 2022-11, Vol.29 (6), p.839-848
Main Authors: Pakhomov, M. A., Philippov, M. V., Chokhar, I. A., Terekhov, V. I.
Format: Article
Language:English
Subjects:
Blowing
Efficiency
Gas jets
Infrared cameras
Physics
Physics and Astronomy
Secondary flow
Thermodynamic efficiency
Thermodynamics
Wall jets
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Summary:We present the experimental results on the thermal efficiency in a wall gas jet blown through inclined cylindrical holes along a smooth surface, and when a secondary flow is blown through cylindrical holes into a transverse trench. The thermal efficiency fields of the wall jet were measured using an infrared camera. In the case of blowing into a trench, the experimental data are characterized by an insignificant influence of the injection parameter on the thermal efficiency of the wall jet for all the trenches under study. It has been established that an increase in the trench depth leads to an increase in the thermal efficiency of the wall gas jet. The maximum increase in thermal efficiency is achieved for a trench with relative depth h/d = 0.94. The data of measurements presented are compared with the experimental and numerical results of other authors for the cases of blowing through the holes into a transverse trench.
ISSN:1531-8699
0869-8643
1531-8699
DOI:10.1134/S0869864322060038