IJMTES – FLOW INVESTIGATION OF AN AXISYMMETRIC SINGLE AND MULTI JETS

Journal Title : International Journal of Modern Trends in Engineering and Science

Author’s Name : Padmalochini S | Sankar V | Karthikeyan L M

Volume 02 Issue 10  Year 2015

ISSN no: 2348-3121

Page no: 15-18

Abstract Computational studies have been made for axisymmetric free jets exhausting from sonic and supersonic nozzles into still air. When considered for still air atmosphere, the jet plume characteristics such as effects of jet Mach number, jet wavelength and shape and curvature of the jet boundary are analysed for varying nozzle divergent angle (5, 10 degree) and jet pressure ratio. The primary variables considered in jet plume structure for jet exhausting into still air are initial inclination of jet boundary, location of first normal shock or Riemann shock wave and its diameter, jet Mach number. For computational calculation of jet plume structure, Gambit and Fluent software is used. The axisymmetric nozzle is modelled and meshed using Gambit. The boundary conditions are specified and jet plume structure is analysed in Fluent. Grid Independent techniques are used to compare the results. The results are then compared to multi jets.

Keywords— Jet plume structure; Riemann Shock wave; sonic and supersonic nozzles

Reference

[1] Eugene S, Grigsby ,Carl E, Lee, Louise P, “Experimental And Theoretical Studies Of Axisymmetric Free Jets” NASA TR-R6
[2] David Munday Ephraim Gutmark, Junhui Liu and K. Kailasanath, “Flow Structure of Supersonic Jets from Conical C-D nozzles” Naval Research Laboratory
[3] K.M. Pandey, Virendra Kumar, Prateek Srivastava (2012), “CFD Analysis of Twin Jet Supersonic Flow with Fluent Software” Current Trends in Technology and Sciences Volume:1, issue:2, (Sept.-2012) ISSN : 2279-0535.
[4] Carola Bauer, Aaron Koch, Francesco Minutolo and Philippe Grenard, “Engineering model for rocket exhaust plumes verified by CFD results” German Aerospace Centre(DLR)
[5] Wang Limei, Cai Chunpei, “Gaseous Plume Flows in Space Propulsion” Chinese Journal of Aeronautics, 2013, 26(3): 522-528.
[6] James H. Henderson, “An Investigation for Modeling Jet Plume Effects on Missile Aerodynamics” Commander, US Army Missile Command ATTN: DRSMI-RD Redstone Arsenal, AL 35898, July (1982).
[7] B. Andre, T. Castelain, and C. Bailly, “Experimental exploration of an underexpanded supersonic jet” French Research Agency ANR-10- BLAN-937-01 project “JESSICA”.
[8] J. R. Henson and J. E. Robertson, “Methods of Approximating Inviscid jet Boundaries for highly Underexpanded Supersonic nozzles” US Air Force Technical report no. AEDC-TDR-62- 7.

Full Paper: Click Here