NAP: a computer program for the computation of two-dimensional, time-dependent, inviscid nozzle flow
A computer program, NAP, is presented for calculating inviscid, steady, and unsteady flow in two-dimensional and axisymmetric nozzles. Interior mesh points are computed using the MacCormack finite-difference scheme, while a characteristic scheme is used to calculate the boundary mesh points. An explicit artificial viscosity term is included for shock computations. The fluid is assumed to be a perfect gas. This method was used to compute the steady flow in a 45/sup 0/-15/sup 0/ conical, converging-diverging nozzle, a 15/sup 0/ conical, converging nozzle, and a 10/sup 0/ conical, plug nozzle. The numerical solution agreed well with the experimental data. In contrast to previous time-dependent methods for calculating steady flows, the computational times were less than 1 min on a CDC 6600 computer.
- Research Organization:
- Los Alamos Scientific Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 7230559
- Report Number(s):
- LA-5984
- Country of Publication:
- United States
- Language:
- English
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