Memoirs of the Faculty of Engineering, Yamaguchi University
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Memoirs of the Faculty of Engineering, Yamaguchi University Volume 39 Issue 1
published_at 1988-10
On the Mechanism of Origin of the Non-uniformity in the Film-Cooling Process : 1st Report, Fundamental Properties of the Plane Wall Jet in the Self-Preserving State and Performance of the Experimental Equipment
膜冷却過程における不均一性の発生機構 : 第 1 報 自己保存条件下の平面壁面噴流の基本特性と装置の性能
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Descriptions
A new wind tunnel for the plane wall jet researches was constructed and examined in order to investigate the mechanism of origin of the non-uniformity in the film-cooling process. The design of the contraction, nozzle portion, settling chamber, diffuser, fans and motors is described in detail. The quantities measured with a linearized hot-wire anemometer were the mean velocity, the turbulence intensities and the Reynolds shear stress. The turbulence, as well as the mean flow, reached a selfpreserving state in which the ratio of the maximum velocity to the free stream velocity was 4.1. From the preliminary experiments, it may be right to considered that this wind tunnel has an extensive usefulness for an experimental research for the plane wall jet in the self-preserving state.
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