CAJ | 학술논문

针对大尺寸轴对称高速潜航体壁面压力测点少且间距大,测量数据不足以反映空泡流状态下潜航体壁面压力分布规律的问题,提出基于数值分析的潜航体壁面压力分布计算方法.引入完全空化模型并研究其计算大尺寸潜航体壁面压力分布的可行性,分析潜航体尺寸在垂直方向上引起的水压对潜航体壁面压力分布的影响,获得空化数对潜航体壁面压力分布的影响规律.结果表明,利用完全空化模型计算大尺寸轴对称潜航体壁面压力时必须考虑潜航体尺寸在垂直方向上引起的水压影响;随着空化数的减小,空穴内部压力增大,潜航体壁面低压区增大,空穴尾部封闭端高压区与潜航体头部距离增大.
침대대척촌축대칭고속잠항체벽면압력측점소차간거대,측량수거불족이반영공포류상태하잠항체벽면압력분포규률적문제,제출기우수치분석적잠항체벽면압력분포계산방법.인입완전공화모형병연구기계산대척촌잠항체벽면압력분포적가행성,분석잠항체척촌재수직방향상인기적수압대잠항체벽면압력분포적영향,획득공화수대잠항체벽면압력분포적영향규률.결과표명,이용완전공화모형계산대척촌축대칭잠항체벽면압력시필수고필잠항체척촌재수직방향상인기적수압영향;수착공화수적감소,공혈내부압력증대,잠항체벽면저압구증대,공혈미부봉폐단고압구여잠항체두부거리증대.
@@@@The regularity of surface pressure distribution of large axisymmetric submerged body is not ade-quately reflected by measured data,because pressure measuring points arranged on surface of high-speed submerged body are less and the distance between every two measuring points is larger. A computation method based on numerical analysis is presented to describe the surface pressure distribution of large submerged body. Full cavitation model is introduced. Its feasibility of calculating surface pressure of large submerged body is studied. The effect of hydraulic pressure at vertical direction caused by the size of large submerged body on the surface pressure distribution is analyzed.And the impact of cavitation numbers on the regularity of sur-face pressure distribution of large submerged body is studied. Results show that the influence of hydraulic pressure at vertical direction on the surface pressure distribution caused by submerged body size is neces-sary to be considered when the full cavitation model is used to obtain surface pressure of large submerged body.The smaller the cavitation number is,the larger the pressure in cavity and the area of low pressure on surface are.The distance between head of submerged body and high-pressure of cavity closed area increases.