Computational Study of The Effect of CR and L_D on Nacelle Inlet

Nacelle is one of important configurations of subsonic transport aircraft and its design needs considerations from many aspects. Contractive Ratio(CR) and length of diffused section(LD) are very important parameters in nacelle inlet design. The two parameters have direct influence on the efficiency of inlet. In this paper, for investigating the sensitivity of CR and LD, numerical simulations of different isolated nacelles are carried out and results of total pressure recovery coefficient and inlet distortion coefficient are obtained.