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Estimation of Flow Field Properties and Thrust Performances of Axisymmetric Plug - Nozzles using CFD Simulations

Božić, Ognjan and Porrmann, Dennis (2009) Estimation of Flow Field Properties and Thrust Performances of Axisymmetric Plug - Nozzles using CFD Simulations. In: Turbulence, Heat and Mass Transfer 6, pp. 1-13. 6th International Symposium on Turbulence, Heat and Mass Transfer (THMT´09), 2009-09-14 - 2009-09-18, Rom, Italy. doi: 10.1615/ICHMT.2009.TurbulHeatMassTransf.700.

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The objective of the presented work is to investigate the slipstream effects on the flow properties and thrust performances of a full-length and truncated annular plug nozzle of a small rocket launcher during a suborbital flight. The nozzle flow properties are investigated for three characteristics flow conditions (M∞ = 1.3, 2.59 and 9.7), using CFD simulations. When the rocket launcher flies through the atmosphere, the body geometry produces a slipstream with conditions in the nozzle area that are different from the undisturbed environment. The in-flight behavior of the truncated plug nozzles is complicated and affected also by recirculation regions that take place behind the shroud and plug base. In this paper special emphasis is given to investigate the slipstream effects between the hot exhaust plume from the rocket engine and the external coaxial supersonic/hypersonic air flow and their influence on the slope and position of different shocks generated in the separated flow region (realignment shocks, recompression shocks, plug base lip shock and trailing shocks). Also analyzed is the pressure distribution on the shroud base, spike supersonic ramp and spike base for closed-wake operations to determine the overall engine performance. The results of the numerical simulations confirm the altitude-compensating features of the annular truncated plug nozzles.

Item URL in elib:https://elib.dlr.de/63096/
Document Type:Conference or Workshop Item (Speech)
Title:Estimation of Flow Field Properties and Thrust Performances of Axisymmetric Plug - Nozzles using CFD Simulations
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:September 2009
Journal or Publication Title:Turbulence, Heat and Mass Transfer 6
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-13
Keywords:annular, truncated plug nozzles, aerospike, slipstream, in-flight behaviour
Event Title:6th International Symposium on Turbulence, Heat and Mass Transfer (THMT´09)
Event Location:Rom, Italy
Event Type:international Conference
Event Start Date:14 September 2009
Event End Date:18 September 2009
Organizer:Dept. of Mechanics and Aeronautics Faculty of Engineerig,
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Raumfahrzeugsysteme - Numerische Verfahren und Simulation (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Bozic, Dr.-Ing. Ognjan
Deposited On:10 Feb 2010 11:17
Last Modified:24 Apr 2024 19:28

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