A BAROTROPIC CAVITATION MODEL WITH THERMODYNAMIC EFFECTS
A BAROTROPIC CAVITATION MODEL WITH THERMODYNAMIC EFFECTS
复制标题
具有热力效应的正压空化模型
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
L. d'Agostino
中科院分区：
文献类型：
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作者：
E. Rapposelli;L. d'Agostino
扩展Brennen的原始公式[1]，本文阐述了改进的泡状等焓流模型的发展，该模型自然地以近似但基于物理的方式解释了热空化效应和活性核浓度。该模型允许封闭的形式评价的空化混合物中的声速，与定期过渡到声速在液体中的零空隙率。从饱和条件的数值积分，然后导致正压关系的空化/完全润湿流，取决于压力的值。显示了三种不同液体（水，LOX和LN 2）的声速曲线，突出了不同温度下热效应的影响。然后将该模型应用于轴对称人头模型和二维水翼的空化数值模拟。结果与现有的实验数据进行了比较，评估的目的是更复杂的空化流动的工程模拟，特别强调液体推进剂火箭的应用，热效应往往是至关重要的建议模型的潜力。
Extending Brennen’s original formulation [1], this paper illustrates the development of a modified bubbly isenthalpic flow model that naturally accounts in an approximate but physicalbased way for the effects of thermal cavitation and the concentration of active nuclei. The model allows for the closed form evaluation of the sound speed in the cavitating mixture, with regular transition to the sonic speed in the liquid at zero void fraction. Numerical integration from the saturation conditions then leads to the barotropic relation for the cavitating/fully-wetted flow, depending on the value of the pressure. Speed of sound curves for three different liquids are shown (water, LOX and LN2), highlighting the influence of thermal effects at different temperatures. The model is then applied to the numerical simulation of cavitation on axisymmetric headforms and 2D hydrofoils. The results are compared with available experimental data with the purpose of assessing the potential of the proposed model for engineering simulation of more complex cavitating flows with special emphasis on liquid propellant rockets applications, where thermal effects are often of crucial importance.
DOI：
10.1017/cbo9781107338760
发表时间：
1995-02
期刊：
FUZZ-IEEE'99. 1999 IEEE International Fuzzy Systems. Conference Proceedings (Cat. No.99CH36315)
影响因子：
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作者：
C. Brennen
通讯作者：
C. Brennen