【摘要】 本文应用频域分析技术对二维绕流场中游移型空化诱生压力谱特性进行了数学描述,并计算了弓形体绕流场及Venturi型空化敏感仪在空化流时空泡溃灭压强功率谱。结果表明:游移型空化诱生压力谱特性具有白噪声性质,不因绕流场形态而异,但它与振荡型的片状空化压力谱特性则截然不同。更多还原

【Abstract】 In this paper, the collapsing characterisfics of cavitation-bubble clusters in a two-dimensional compressible flow are studied. The theory of random process is adopted to analyze the spectral property of the pressare generated by the bubbles. Analytical results show that the power spectrum of travelling-bubble-cluster induced pressure keeps constant in a large frequency range. Unlike the type of oscillating sheet cavitation, no energy concentration phenomenon will exist in a narrow frequency range, so that there will be less possibility to induce structure vibration than that resulted from the former.更多还原