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Design of a pintle nozzle for the augmented thrust propulsion using multiple internal expansion waves

Harisrinivasan, U and Baskaran, RV and Sanal Kumar, VR (2018) Design of a pintle nozzle for the augmented thrust propulsion using multiple internal expansion waves. In: 54th AIAA/SAE/ASEE Joint Propulsion Conference, 2018, 9 - 11 July 2018, Cincinnati.

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Official URL: https://doi.org/10.2514/6.2018-4483


In this paper comprehensive numerical studies are carried out for the geometry optimization of a pintle nozzle for an augmented thrust propulsion using multiple internal expansion waves named herein as Ukesh Hari expansion fan. Numerical studies are carried out using a validated 2D density based implicit k-ω SST turbulence model. The code has been validated, calibrated and verified using the exact solution of boundary-layer displacement thickness obtained at the Sanal flow choking condition using the closed-form analytical model of V.R. Sanal Kumar et al. [1] (AIP Advances, 8, 025315, 2018). Through the parametric analytical studies we conjectured that there is an optimum ratio between the upstream and downstream convex ramp angle for every pintle design creating a desirable peak Ukesh Hari expansion fan effect. We have comprehended that the optimum ratio of the ramp convex angle and the predesigned upstream and the downstream ramp locations ensure a shock-less flow inside the CD nozzle at various operating conditions for enhancing the momentum thrust for high-range aerospace vehicles without any expense of additional fuel. We concluded that designing a pintle nozzle with Ukesh Hari expansion fan effect is a meaningful objective for improving the payload capability and the thrust augmentation of aerospace vehicles lucratively.

Item Type: Conference Paper
Publication: 2018 Joint Propulsion Conference
Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA
Additional Information: The copyright for this article belongs to the American Institute of Aeronautics and Astronautics.
Keywords: Aerospace vehicles; Boundary layers; Expansion; Nozzles; Propulsion; Turbulence models, Analytical studies; Displacement thickness; Geometry optimization; Operating condition; Payload capabilities; SST turbulence models; Thrust augmentation; Thrust propulsion, Nozzle design
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 10 Aug 2022 10:04
Last Modified: 10 Aug 2022 10:04
URI: https://eprints.iisc.ac.in/id/eprint/75749

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