Sonic boom prediction is a key issue to be addressed in supersonic commercial transport design. The ifnite volume method base on multi-block structured girds was applied to solve Euler/N-S governing equations for predicting near field signatures of sonic boom. Two benchmark cases of typical LSB(Low Sonic Boom) configurations were calculated, including SEEB-ALR model and Delta wing model. The predicted results were compared with experimental data. The results show that Navier-Stokes computations are not always necessary for simple lfow-ifelds. The tail shock changes from a single to multiple-shock waveform from on-track to off-track. There is very few inlfuence of the attack of angle on the intensity of the bow shock. The shock starting from the leading edge of wing becomes stronger as the attack of angle increases.