Description of the computations for three-dimensional nonaxisymmetric nozzles and analysis of the flowfields are presented in this paper. Two different types of nozzles are investigated for con~pressible flows at high Reynolds numbers. These are the single-expansionramp and scramjet nozzles. The computation for the single-expansion-ramp nozzle focuses on the condition of low pressure ratio, whi...

The paper gives experimental observations on the hypersonic flow past an axisymmetric flat-face cylinder with a protruding sharp-tip spike at freestream Mach number of $M_\infty = 8.16$ two different Reynolds numbers based base body diameter ($Re_D 0.76 \times 10^6$, and $3.05 10^6$). Furthermore, modal analysis is done schlieren images to understand dynamics parallel unsteady pressure measurem...

Abstract A computational study of a supersonic flow in the base region and nearest wake cylindrical body moving at speed has been carried out. In this case, “prehistory” was taken into account, i.e. configuration domain as close possible to real one. The use various RANS turbulence models for calculating analyzed. following were considered: 1) SST model; 2) Standard k– ε 3) RNG 4) Reynolds Stre...

This study investigates (1) the effect of modifying the design of a dry powder inhaler on the device performance, and (2) which design features significantly contribute to overall inhaler performance. Computational Fluid Dynamics (CFD) analysis was performed to determine how the flowfield generated in an Aerolizer at 60 l min(-1) varied when the inhaler grid and mouthpiece were modified. The co...

For high-speed air breathing engines, fuel injection and subsequent mixing with air is paramount for combustion. The high freestream velocity poses a great challenge to efficient mixing both in macroscale and microscale. Utilising cavities downstream of fuel injection locations, as a means to hold the flow and stabilise the combustion, is one mechanism which has attracted much attention, requir...