【摘要】 本文建立了二维非恒定片状空化云溃灭时作用于固体边界上压强的计算模型,将各空泡的溃灭压强看作是一个随机脉冲序列,应用随机过程的处理方法分别从时域及频域导出了其统计特性(数学期望、均方差和功率谱密度)的表达式,并对一种二维弓形绕流体后部非恒定片状空化云溃灭特性及由此作用于固体边界上给定点处压强的统计特性进行了数值计算和实验分析.更多还原

【Abstract】 A Computational Model for simulating the pressures on a solid boundary induced by two-dimensional sheet cavitation is proposed. By considering the bubblegenerated pressures on the solid wall as a series of random impulses, the statistic characteristics of the pressures (mathematical expectation, root mean square and the power spectra) are fomulated in both time domain and frequency domain by means of the theory of stochastic process. Numerical and exprimental investigations are made for a two-dimensional unsteady cavitating flow past a bow-shaped body.更多还原