Development of a quiet supersonic wind tunnel with a cryogenic adaptive nozzle

This technical report was published in 1991 by the MCAT Institute, a research organization that frequently collaborated with NASA on aeronautical engineering projects. The document addresses the specific engineering challenge of achieving laminar flow within a supersonic wind tunnel, a critical hurdle for high-speed aircraft design. By focusing on the integration of a cryogenic adaptive nozzle, the author sought to minimize acoustic noise and turbulence, which are primary obstacles to accurate aerodynamic testing at supersonic speeds.

The work was authored by Stephen W. D. Wolf, a researcher noted for his contributions to wind tunnel testing and instrumentation. The publication serves as a detailed academic record of the methodologies required to maintain cryogenic temperatures while simultaneously adjusting nozzle geometry to ensure test section uniformity. It reflects a period of intense focus on the High-Speed Research program, aiming to refine the precision of atmospheric simulation for the next generation of civil supersonic transport vehicles.