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Engine Inflow Boundary Conditions for Specification of Mass Flow

Dwight, Richard (2006) Engine Inflow Boundary Conditions for Specification of Mass Flow. DLR-Interner Bericht. DLR IB 124-2006/6.



Two engine inflow boundary conditions with direct specification of the integral quantities massflow and WAT respectively are formulated and implemented in the DLR Tau-code. For the formulation a summary of characteristic theory for the Euler equations is given, followed by the application of this theory to the derivation of several permeable boundary conditions with various flow quantities specified on the inflow surface. It is noted that the specification of a single integral quantity on the inflow face is insufficient to prescribe the flow there fully, and a remedy is proposed whereby the massflow distribution over the inflow boundary is obtained from the boundary near points. It is shown that this method is more efficient than specification of massflow by iteration on the inflow pressure, and has also less user-defined parameters. Similar results for the WAT boundary condition are given. Finally the relevant parameter settings as implemented in Tau are described, and best-practice guidelines are given on the use of the new boundary conditions.

Item URL in elib:https://elib.dlr.de/50803/
Document Type:Monograph (DLR-Interner Bericht)
Title:Engine Inflow Boundary Conditions for Specification of Mass Flow
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Refereed publication:No
Open Access:Yes
Keywords:characteristic boundary conditions,
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > CASE
Deposited By: Dwight, Dr.(PH.D.) Richard
Deposited On:10 Aug 2007
Last Modified:31 Jul 2019 19:20

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