For the problem of ventral support interference in a transonic-speed wind tunnel with the blended-wing-body aircraft NPU-BWB-300 installed,the numerical simula-tion method based on Reynolds-averaged Navier–Stokes(RAN...For the problem of ventral support interference in a transonic-speed wind tunnel with the blended-wing-body aircraft NPU-BWB-300 installed,the numerical simula-tion method based on Reynolds-averaged Navier–Stokes(RANS)equations is used to study the influence law of aerodynamic characteristic interference with the variation of Mach numbers and angles of attack.Moreover,the characteristics of ventral support interference for blended-wing-body aircraft and conventional aircraft are compared.The relevant mechanism of the generation and change of ventral support interfer-ence is revealed by employing analysis of the body surface pressure,the shock wave of the strut,and the separation area between the strut and the aircraft.The aerody-namic characteristic interference obtained from the numerical simulation is linearized based on the principle of the least square method.Afterward,a numerical simulation correction method of ventral support interference in the transonic-speed wind tunnel for the blended-wing-body aircraft is developed.Finally,the test results after the cor-rections of ventral support interferences in the transonic-speed wind tunnel for NPU-BWB-300 are obtained,which is significant for the evaluation of current aerodynamic performances and subsequent optimization designs.展开更多
基金This work has benefited greatly from the support of the National Key Project of China under grant GJXM92579the Shenyang Key Laboratory of Aircraft Icing and Ice Protection.
文摘For the problem of ventral support interference in a transonic-speed wind tunnel with the blended-wing-body aircraft NPU-BWB-300 installed,the numerical simula-tion method based on Reynolds-averaged Navier–Stokes(RANS)equations is used to study the influence law of aerodynamic characteristic interference with the variation of Mach numbers and angles of attack.Moreover,the characteristics of ventral support interference for blended-wing-body aircraft and conventional aircraft are compared.The relevant mechanism of the generation and change of ventral support interfer-ence is revealed by employing analysis of the body surface pressure,the shock wave of the strut,and the separation area between the strut and the aircraft.The aerody-namic characteristic interference obtained from the numerical simulation is linearized based on the principle of the least square method.Afterward,a numerical simulation correction method of ventral support interference in the transonic-speed wind tunnel for the blended-wing-body aircraft is developed.Finally,the test results after the cor-rections of ventral support interferences in the transonic-speed wind tunnel for NPU-BWB-300 are obtained,which is significant for the evaluation of current aerodynamic performances and subsequent optimization designs.
