CAJ | 학술논문

为了研究喷流角度对超声速来流的影响，利用FLUENT软件，粘性项采用二阶中心差分，对流项采用二阶迎风格式，湍流模型采用标准的k-ε双方程，分别对喷流角度为30°，60°，90°，120°，135°和150°进行了数值模拟。研究发现：随着喷流角度的增大，平板底壁面上分离范围扩大，对称面上弓形激波逐渐增强，总压损失增加，喷流角为135°时混合效率最大。
위료연구분류각도대초성속래류적영향，이용FLUENT연건，점성항채용이계중심차분，대류항채용이계영풍격식，단류모형채용표준적k-ε쌍방정，분별대분류각도위30°，60°，90°，120°，135°화150°진행료수치모의。연구발현：수착분류각도적증대，평판저벽면상분리범위확대，대칭면상궁형격파축점증강，총압손실증가，분류각위135°시혼합효솔최대。
In order to study the influence of jet angle on the supersonic inflow,by using the FLUENT software,the numerical simulation of injection angles of 30°,60°,90°,120°,135° and 150° was conducted with the second-order central difference for the viscosity term,second order upwind scheme for the advection term and the standard double-equation k-ε for the turbulence model. It is found in the research that with the increase of injection angle,the separation range of the flat bottom area is expanded, the bow shock wave of symmetry plane is enhanced and the total pressure loss is increased,and the mixing efficiency is best when the injection angle is 150°.