Abstract: In this paper some points concerning transonic potential method are briefly reviewed. The correction orders--nonisentropic jump condition and the vorticity generated behind the shock--are analysed and estimated then under the condition of small disturbance. Comparing two correction orders shows that vorticity correction is indeed of higher order. A nonisentropic potential formulation is described in this paper. Numerical examples depict that this nonisentropic method can simulate inviscid flow better than traditional potential method, while it has the advantage of simplicity in mathematical aspect as in original potential method.

Key words: transonics, potential flow, calaulation methods