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Theoretical Analysis of Compressible Flows in Ducts and Chambers at High Oscillating Pressures

Kriegseis, J. and Marschall, Hubert and Tropea, Cameron (2008):
Theoretical Analysis of Compressible Flows in Ducts and Chambers at High Oscillating Pressures.
In: AIAA-2008-0788; 46th AIAA Aerospace Science Meeting and Exhibit; Reno, Nevada, USA, [Conference or Workshop Item]

Abstract

In this study an unsteady compressible-flow model is developed for a better prediction of the temporal pressure evolution in chambers and ducts at high oscillating pressures. Primary and secondary losses such as duct friction, stream diversion and Carnot-shock effects are included in the model paying close attention to the experimental rig\'\is setup. This paper contains a short review of the associated gas dynamics and then the conversion to a system of equations to be later implemented. The boundary conditions for the model, such as the case differentiation for subsonic- or sonic-duct flow are self-adjusting after each time step during the solution of the ODE describing the evolution of the chamber pressure. Due to the effective prediction of the temporal chamber pressure evolution, this model can be used to optimize rig-setup parameters for high-pressure conditions with unsteady character, thus reducing the development time of the actual experiment.

Item Type: Conference or Workshop Item
Erschienen: 2008
Creators: Kriegseis, J. and Marschall, Hubert and Tropea, Cameron
Title: Theoretical Analysis of Compressible Flows in Ducts and Chambers at High Oscillating Pressures
Language: English
Abstract:

In this study an unsteady compressible-flow model is developed for a better prediction of the temporal pressure evolution in chambers and ducts at high oscillating pressures. Primary and secondary losses such as duct friction, stream diversion and Carnot-shock effects are included in the model paying close attention to the experimental rig\'\is setup. This paper contains a short review of the associated gas dynamics and then the conversion to a system of equations to be later implemented. The boundary conditions for the model, such as the case differentiation for subsonic- or sonic-duct flow are self-adjusting after each time step during the solution of the ODE describing the evolution of the chamber pressure. Due to the effective prediction of the temporal chamber pressure evolution, this model can be used to optimize rig-setup parameters for high-pressure conditions with unsteady character, thus reducing the development time of the actual experiment.

Title of Book: AIAA-2008-0788; 46th AIAA Aerospace Science Meeting and Exhibit; Reno, Nevada, USA
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA)
16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA) > Dynamics of drops and sprays
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Date Deposited: 03 Sep 2010 11:03
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