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Performance Investigation of a Rectangular Ramjet Intake with Throat Flush Slot Bleed System

Pattnaik, SPS and Rajan, NKS (2022) Performance Investigation of a Rectangular Ramjet Intake with Throat Flush Slot Bleed System. In: 3rd National Aerospace Propulsion Conference, NAPC 2020, 17 - 19 December 2020, Virtual, Online at Bengaluru, pp. 357-383.

Full text not available from this repository.
Official URL: https://doi.org/10.1007/978-981-19-2378-4_22


Results of numerical investigation of flow and performance characteristics of a rectangular mixed-compression intake with boundary-layer bleed are presented. A flush slot configuration applied at the intake throat has been studied to evaluate its effect on the compression performance. The viscous flowfield has been obtained by solving Favre-averaged Navier–Stokes equations with SST k-ω turbulence model. The analysis has been carried out at a range of freestream Mach numbers of 1.7–2.8 and 0° angle-of-attack, corresponding to a unit Reynolds number of approximately 1.8–3.0 × 107 m−1. The results show that with the use of bleed, the low energy boundary layer and the secondary cross flows are successfully removed near the throat as well as the terminal shock gets stabilized at its entrance. Consequently, the exit flowfield uniformity as well as the critical and peak total pressure recovery improves considerably compared to the intake without bleed system. Furthermore, the critical area-averaged intake exit Mach number reduces by about 0.04 in the complete operating regime. As well as the overall mass capture is found to increase at all operating conditions prior to “unstart because of SWBLI”, since the throat separation bubble is reduced and hence the cowl shock is pushed downstream.

Item Type: Conference Paper
Publication: Lecture Notes in Mechanical Engineering
Publisher: Springer Science and Business Media Deutschland GmbH
Additional Information: The copyright for this article belongs to the Springer Science and Business Media Deutschland GmbH.
Keywords: Angle of attack; Boundary layers; Computational fluid dynamics; Flow fields; Mach number; Navier Stokes equations; Reynolds number; Turbulence models, Flush slot bleed; Mixed compressions; Mixed-compression intake; Numerical investigations; Performance; Ramjets; Shock wave/turbulent boundary-layer interaction; Shock-waves; Total pressure recovery; Turbulent boundary-layer interactions, Shock waves
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 22 Aug 2022 09:28
Last Modified: 22 Aug 2022 09:28
URI: https://eprints.iisc.ac.in/id/eprint/76135

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