Higher Mean-Flow Approximation for a Solid Rocket Motor with Radially Regressing Walls

摘要

In A recent study leading to an exact solution of the Navier-Stokes equations, a mistake in calculating a simple constant propagates into several equations. The error first appears in Eq. (29) of the subject paper, where the coefficient of the third derivative at order s must be a "4" instead of a "3." To confirm this correction, we consider the case for which the porous walls are not regressing (i.e., α = 0); in this context, we recognize the importance of recovering the model equation obtained by Yuan and Finkelstein[2], which is further confirmed by Terrill and Thomas[3]. This will be the case only when the proper constant 4 is used. In what follows, each equation affected by this oversight is listed in its amended form. Note that graphical results in [1] remain accurate representations of the solution because of the small discrepancy that this change brings to bear on the model.