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Firstly, a well-known calculation and graphical packages have been used to create the unit model matrix for each Mach number. Through this work, two computational stages have been used and both with the aid of the computer. This research develops a new approach that helps the machine designer to create this profile.
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Although, there are a variety of CFD & FE packages that deal with nozzle design, they all require the profile of the nozzle to be started with. The aim of this paper is to create an automatic way to perform the nozzle profile using the above method. Unfortunately, this technique can be performed only through a lengthy graphical procedure.
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The characteristic method is a general technique in which the design of a nozzle can be achieved. An advanced design method must be used when the conditions are critical and wave-free stream must be reached. The supersonic convergent-divergent nozzles have many applications. The convergent-divergent nozzle geometry has been modeled and simulated employing turbulence models: K-ε standard wall function turbulence model from the code was validated with the commercial computational fluid dynamics. The results show that we can fix the flow parameter which will result in the maximum gain in the base pressure, velocity and temperature. Nozzles were operated with the NPR in the range from 3 to 11. The duct wall pressure field is not negatively affected by the dynamic control. The results indicate that the micro-jets can oblige as the effective regulators of the pressure in the base area.
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The total wall pressure distribution from inlet to the outlet too was recorded. The L/D of the duct was 1, 2, 4, 5, 6, 8 and 10. The micro-jets are suddenly expanded into a two-dimensional planar area ratio of 3.24. The inertia level at the inlet to suddenly expanded duct was 1.87. At the exit of the divergent nozzle in the base region 1 mm of two micro-jets orifice diameter has been arranged at ninety degrees at pcd 13 mm to control base pressure. This paper presents numerical study was undertaken to identify the use of the micro-jets to regulate the pressure in the region from two-dimensional convergent-divergent (CD) Nozzle.
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