Characteristic studies of supersonic diffuser with various ramp design and optimization of ramp profile
Objective:
The main idea behind the proposed project is to decrease the pressure loss at the supersonic diffusers with the help of varying the conventional ramp design. Three different ramp profiles (Sharp edged conic section, Blunted conic section and Ogive conic section) are optimized for the particular inlet Mach number. The efficient design for the supersonic compression process is to be obtained from the experimental analysis.
Introduction:
Designing supersonic diffusers requires more concentration than the subsonic diffusers, which is mainly due to the formation of shockwaves. In this scenario, the ramp (a part of the supersonic
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They are: o Ramp body, o Fore body of subsonic diffuser, o Rear body of subsonic diffuser.
Ramp body:
The ramp body is the component to create shock waves. The ramp body has a collar for mounting purpose along the axis of the diffuser.
Fore body of the subsonic diffuser:
The fore body has the cowl lip section which generates the normal shock waves. The fore body has the ports across its walls to measure the static pressure inside the diffuser section.
Rear body of the subsonic diffuser:
The rear body which is very helpful for stream lining the flow flied from the diffuser. The collars of the all components are connected together which provides the whole setup of the supersonic diffuser.
The mounting system is also to be designed very carefully, to facilitate testing of the model in the laboratory, using open test jet facility.
Methodology:
Design a conical nozzle for the desired exit Mach number.
Optimally design a fore body and rear body (cowl) of the diffuser.
Analyse the preliminary design with the help of an analysis software (ANSYS).
Optimize the design further depending upon the CFD results.
Fabricate the nozzle and the diffuser along with the mounting system.
Carry out experimental work using the Open jet facility available in the Aerodynamics laboratory, Department of Aerospace Engineering, Madras Institute of Technology.
Implementation:
The project is to be implemented in three phases:
Phase I: Preliminary
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