Engineering topics

Guy, Robert W.

Publications and source records attributed to Guy, Robert W..

2 records

NASA NTRS1989

CFD simulation of square cross-section, contoured nozzle flows - Comparison with data

Computational analyses have been made of the flow in NASA Langley's Arc-Heated Scramjet Test Facility's Mach 4.7 and Mach 6 square cross-section contoured nozzles, for comparison with experimental results. The analyses, which were performed using a three-dimensional RANS computer code assuming a single species gas with constant specific heats, were intended to provide insight into the nature of the flow development in this type of nozzle. The computational results showed the exit flow distribution to be affected by counter-rotating vortices along the centerline of each nozzle sidewall. Calculated flow properties show general, but not complete, agreement with experimental measurements in both nozzles.

Ostrander, Mark J.↗

NASA NTRS1987

Test flow calibration study of the Langley Arc-Heated Scramjet Test Facility

The test flow at the exits of two square cross-section contoured nozzles with nominal exit Mach numbers of 4.7 and 6 has been studied as calibration data for the NASA-Langley Arc-Heated Scramjet Test Facility over simulated flight conditions from Mach 5.5 (at altitudes from 98,600-128,000 ft) to Mach 7 (at altitudes from 108,000-149,000 ft). Nozzle exit contour maps of measured thermodynamic properties, calculated Mach number, and calculated mass flow are used to determine the mass flow approaching the inlets of various scramjet engines. Good agreement is found between experimentally measured facility total mass flow and facility total mass flow determined by integration of the nozzle exit mass flow contours.

Thomas, Scott R.↗