Transpiration-Film Cooling Study Using Spiral-Wound Ribbon Nozzle

摘要

The program consists of an analytical and experimental evaluation of the cooling capability of a nozzle design made by the spiral-wound-nozzle method. During the first quarter, the following work was accomplished: (1) The analytical study was essentially completed and the equations for the performance study were selected or developed. Sections of the digital computer program were completed and are being checked out. A simple electrical analog was built for checking out the computer program. (2) Initial trials of diffusion welding and diffusion bonding of aluminum, copper, stainless steel, and tantalum indicated very promising results for bonding of the structure without blockage of the coolant passages. (3) The laboratory bench test apparatus was completed and the initial shakedown test run completed satisfactorily. Evaluation of instrumentation techniques is in progress and initial use of ceramiccoated fine wire indicates promise for temperature measurements in this application. (Author)