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平板喷气流场特性影响因素试验

DOI: 10.3969/j.issn.1006-7043.201212113

Keywords: 平板, 流场, 气层形态, 扩散角, 气泡流, 过渡流, 分层流, 气流量系数

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Abstract:

为了揭示平板底部喷气时气层的流动特征,在低湍流度水洞中开展了平板气液两相流边界层特性模型试验,研究了气流量、来流速度等对气层宏观形态的影响,分析了气层流态的转变规律。研究结果表明:气层在平板底部随来流向后扩散,存在一个横向扩散角;气流量增加,横向扩散角增大;来流速度增加,横向扩散角减小。气层流态与气流量和来流速度有关,当无因次气流量系数??C????q????≤0.610时,气层主要表现为气泡流;当??C????q????≥1.446时,气层转变为分层流,其他情况下呈现出分层流与气泡流同时存在的过渡流态。

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