Engineering topics

Amick, J. L.

Publications and source records attributed to Amick, J. L..

3 records

NASA NTRS1975

Design and performance of the University of Michigan 6.6-inch hypersonic wind tunnel

The tunnel described has several design features intended to maintain laminar flow in the boundary layer of its nozzle. Measurements show that transition to turbulence in the nozzle wall boundary layer begins at the throat and is sensitive to surface roughness, heat transfer rate, and longitudinal radius of curvature. The observed dependence of transition on heat transfer rate is the reverse of that predicted by stability theory for infinitesimal disturbances. Tests include boundary layer surveys of a contoured nozzle and a conical nozzle with four interchangeable throats.

Amick, J. L.↗

NASA NTRS1967

Simulation experiments for jet interaction

Simulators to facilitate experimental studies of two-dimensional interaction of jet with supersonic free stream

ARC JET↗

NASA NTRS1959

Interaction Effects Produced by Jet Exhausting Laterally Near Base of Ogive-Cylinder Model in Supersonic Main Stream

The experimentally determined interaction effects of a side jet exhausting near the base of an ogive-cylinder model are presented and discussed. The interaction force appears to be independent of main-stream Mach number, boundary-layer condition (laminar or turbulent), angle of attack, and forebody length. The ratio of interaction force to jet force is found to be inversely proportional to the square root of the product of jet stagnation-to-free-stream pressure ratio and jet-to-body diameter ratio.

Vinson, P. W.↗