On the Simulation of Supersonic Flame Holder Cavities with OpenFOAM PDF Download
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Author: Zachary Chapman
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 0
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Author: Zachary Chapman
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 0
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Author: Thomas Nuese
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 0
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Author: Independently Published
Publisher:
ISBN: 9781723862571
Category :
Languages : en
Pages : 68
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Book Description
The current work has focused on finding the optimum cavity properties to enhance themixing phenomenon and combustion processes in supersonic flow using ComputationalFluid Dynamics (CFD) ANSYS Fluent. Various models has been modeled with differentvalues of offset ratios (OR) and aft ramp angles (ϴ) while keeping the length-to-depth ratioconstant. All cavity flows have taken open type i.e. length-to-depth ratio
Author: Mingbo Sun
Publisher: Springer Nature
ISBN: 9811535957
Category : Technology & Engineering
Languages : en
Pages : 380
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Book Description
This book describes the unsteady phenomena needed to understand supersonic combustion. Following an initial chapter that introduces readers to the basic concepts in and classical studies on unsteady supersonic combustion, the book highlights recent studies on unsteady phenomena, which offer insights on e.g. interactions between acoustic waves and flames, flow dominating instability, ignition instability, flame flashback, and near-blowout-limit combustion. In turn, the book discusses in detail the fundamental mechanisms of these phenomena, and puts forward practical suggestions for future scramjet design.
Author: K.-Y. Hsu
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: M. R. Gruber
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Adela Ben-Yakar
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: MacKenzie J. Collatz
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 140
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Author: Douglas L. Davis
Publisher:
ISBN: 9781423575771
Category : Airplanes
Languages : en
Pages : 239
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Book Description
This study investigated the flame holding properties of recessed cavities in supersonic flow using numerical analysis techniques. A simplified analytical model indicated that an important property for flame holding was the lower residence time. Several chemical kinetic rate models for hydrogen and hydrocarbon combustion were compared. The perfectly stirred reactor model also indicated that trace species diffusion should increase flame spreading rate, and that heat loss reduces flame holding limits. After nonreacting calibration, two- dimensional simulations confirmed the perfectly stirred reactor results for blowout limits. Also, the effect of trace species diffusion on flame spreading was shown to be negligible, and the reduced flammability with heat loss was confirmed. Lowering the temperature of the inflow boundary layer was shown to reduce the flammability limits. Three-dimensional cavities were shown to generate axial vorticity and slightly enhance flame spreading. The methodology developed in this research provides a design guide for the size of cavity required to provide flame holding for a scramjet combustor. Also, reduction of heat losses was shown to be a method to improve flame holding performance without increasing the cavity size.
