Baseline Computational Fluid Dynamics Methodology for Longitudinal-Mode Liquid-Propellant Rocket Combustion Instability
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Baseline Computational Fluid Dynamics Methodology for Longitudinal-Mode Liquid-Propellant Rocket Combustion Instability

Baseline Computational Fluid Dynamics Methodology for Longitudinal-Mode Liquid-Propellant Rocket Combustion Instability


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About the Book

A computational method for the analysis of longitudinal-mode liquid rocket combustion instability has been developed based on the unsteady, quasi-one-dimensional Euler equations where the combustion process source terms were introduced through the incorporation of a two-zone, linearized representation: (1) A two-parameter collapsed combustion zone at the injector face, and (2) a two-parameter distributed combustion zone based on a Lagrangian treatment of the propellant spray. The unsteady Euler equations in inhomogeneous form retain full hyperbolicity and are integrated implicitly in time using second-order, high-resolution, characteristic-based, flux-differencing spatial discretization with Roe-averaging of the Jacobian matrix. This method was initially validated against an analytical solution for nonreacting, isentropic duct acoustics with specified admittances at the inflow and outflow boundaries. For small amplitude perturbations, numerical predictions for the amplification coefficient and oscillation period were found to compare favorably with predictions from linearized small-disturbance theory as long as the grid exceeded a critical density (100 nodes/wavelength). The numerical methodology was then exercised on a generic combustor configuration using both collapsed and distributed combustion zone models with a short nozzle admittance approximation for the outflow boundary. In these cases, the response parameters were varied to determine stability limits defining resonant coupling onset.Litchford, R. J.Marshall Space Flight CenterCOMBUSTION STABILITY; COMPUTATIONAL FLUID DYNAMICS; LIQUID ROCKET PROPELLANTS; NUMERICAL ANALYSIS; LONGITUDINAL CONTROL; METHODOLOGY; LAGRANGIAN FUNCTION; FINITE DIFFERENCE THEORY; HIGH RESOLUTION; PROPELLANT SPRAYS; REACTION KINETICS; UNSTEADY FLOW; STABILITY; ACOUSTIC DUCTS; EULER EQUATIONS OF MOTION...


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Product Details
  • ISBN-13: 9781726216722
  • Publisher: Createspace Independent Publishing Platform
  • Publisher Imprint: Createspace Independent Publishing Platform
  • Height: 280 mm
  • No of Pages: 58
  • Spine Width: 3 mm
  • Width: 216 mm
  • ISBN-10: 1726216721
  • Publisher Date: 27 Aug 2018
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 159 gr


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Baseline Computational Fluid Dynamics Methodology for Longitudinal-Mode Liquid-Propellant Rocket Combustion Instability
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