Conical convergent-divergent (CCD) nozzles represent an important category of supersonic jet-engine nozzles which require variable throat areas and variable exit areas to adapt to a range of operating conditions. CCD nozzles with design Mach numbers of 1.3, 1.5, and 1.65 are examined experimentally over a range of fully expanded Mach numbers from 1.22 to 1.71. The characteristics of the flow an...

The airframe-integrated linear-spike nozzle concept applied to an external nozzle for high-speed aircraft was evaluated with regard to the thrust augmentation capability and the trim balance. The main focus was on the vehicle aftbody. The baseline airframe geometry was first premised to be a hypersonic waverider design. The baseline aftbody case had an external nozzle comprised of a simple dive...

Abstract Nozzle erosion directly affects the design quality of hybrid rocket motors, and it is a critical issue that restricts practical application motors. In this paper, coupled numerical simulations combustion flow field thermochemical graphite nozzle in motor with multi-port wagon wheel fuel grain are carried out. The results indicate distributions temperature, species rate show symmetrical...

Lateral nozzle forces are known to cause severe structural damage to any new rocket engine in development. Currently there is no fully coupled computational tool to analyze this fluid/structure interaction process. The objective of this study was to develop a fully coupled aeroelastic modeling capability to describe the fluid/structure interaction process during the transient nozzle operations....

This experimental investigation exemplifies the design and testing of diffuser at compressor inlet nozzle condenser outlet in vapour compression refrigeration system with help R134a refrigerant. The divergence angle 12°,14° convergent are designed for same diameters. Initially diffusers tested is used diameter equal to exit tube evaporator suction compressor. Diffuser helps increases pressure r...