CAJ | 학술논문

应用气泡动力学方程和气泡运动微分方程研究了螺旋桨梢涡空泡的初生问题,并根据简化Reyleigh-Plesset方程推导了不同尺度模型空化初生空泡数换算公式,建立了空化初生尺度换算模型,研究了螺旋桨梢涡空泡初生尺度效应问题.螺旋桨梢涡流场应用RANS方法求解,湍流模型为经过旋转和曲率修正的代数雷诺应力模型(EARSM-CC).计算结果表明,文中建立的数值方法能够准确预报出螺旋桨梢涡流场分布;螺旋桨梢涡空泡初生空泡数计算结果高于试验观察值;应用文中建立的空化初生尺度换算模型得到的结果与数值模拟结果基本吻合,而且其结果偏于安全.
응용기포동역학방정화기포운동미분방정연구료라선장소와공포적초생문제,병근거간화Reyleigh-Plesset방정추도료불동척도모형공화초생공포수환산공식,건립료공화초생척도환산모형,연구료라선장소와공포초생척도효응문제.라선장소와류장응용RANS방법구해,단류모형위경과선전화곡솔수정적대수뢰낙응력모형(EARSM-CC).계산결과표명,문중건립적수치방법능구준학예보출라선장소와류장분포;라선장소와공포초생공포수계산결과고우시험관찰치;응용문중건립적공화초생척도환산모형득도적결과여수치모의결과기본문합,이차기결과편우안전.
The inception of propeller tip vortex cavitation is investigated by using bubble dynamics equa-tion and bubble motion equation. A new scaling relation model about tip vortex cavitation inception is put for-ward by means of simplifying Reyleigh-Plesset equation together with scaling law of minimum pressure coef-ficient. The scaling effects of tip vortex cavitation inception among different scale models are studied. The propeller tip vortex flowfield is calculated using RANS method and the explicit algebraic Reynolds stress model with rotation-curvature correction is adopted. The calculated results show that the numerical method can exactly predict the velocity distribution in tip vortex flowfield. The predicted cavitation inception num-ber is higher than that of experimental result. The results predicted by scaling relation model agree well with the simulated result by numerical method and are more conservative.