A Three-Component Model Suitable for Natural and Ventilated Cavitation

• Published in: Chinese physics letters Vol. 27; no. 9; pp. 171 - 174
• Main Author: 季斌 罗先武 张瑶 冉红娟 许洪元 吴玉林
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.09.2010
• Subjects: Cavitation; Computer simulation; Holes; Local flow; Mass transfer; Mathematical analysis; Mathematical models; set方程; Vehicles; 传质方程; 模型应用; 空化模型; 空化流动; 空化特性; 组分模型; 自然通风
• ISSN: 0256-307X; 1741-3540
• DOI: 10.1088/0256-307X/27/9/096401

A three-component model based on mass transfer equation is proposed to simulate both the natural and ventilated cavitations. In the present cavitation model, the content of nuclei in the local flow field is updated synchronously, and is coupled with the Rayleigh-Plesset equation so as to capture the cavity development. The proposed model is applied for simulating the cavitating flow around a super-cavitating vehicle in different cavitation conditions. In the ease of the natural cavitation simulation, the predicted cavitation characteristics including the cavity length and cavity diameter agrees fairly well with the analytical results. In the case of the mixed cavitation simulation, the gas ventilation obviously influences the development of cavity. With the increase of the gas ventilated rate, the natural cavitation is suppressed remarkably, and a super cavitation is formed even at a relatively larger natural cavitation number.