Numerical study of shear-induced heating in high-speed nozzle flow of liquid monopropellant

X. Shi, Omar Knio, J. Katz

Research output: Contribution to journalEditorialpeer-review

1 Scopus citations

Abstract

A numerical study is performed which focuses on peak temperatures experienced by a liquid monopropellant during high-speed injection in a small-diameter nozzle. Attention is focused on short-duration injection during which the nozzle wall boundary layer is predominantly laminar. An unsteady ID analysis of the temperature distribution associated with sudden fluid acceleration over a flat insulated boundary is first conducted. Expressions are provided which relate the normalized peak wall temperature to the prevailing Eckert and Prandtl numbers. Results reveal a quadratic dependence of the normalized wall temperature on impulse velocity, and a nonlinear variation with Prandtl number. Next, simulation of high-speed flow in an axisymmetric nozzle is performed. The numerical schemes are based on finite-difference discretization of a vorticity-based formulation of the mass, momentum, and energy conservation equations. Implementation of the numerical schemes to flow of LP 1846 in a 4 mm diameter nozzle indicates that preignition is likely to occur for velocities higher than 200 m/s. The effects of wall heat transfer and temperature-dependent properties are also discussed.

Original languageEnglish (US)
Pages (from-to)58-64
Number of pages7
JournalJournal of Heat Transfer
Volume120
Issue number1
DOIs
StatePublished - Jan 1 1998

Keywords

  • Conduction
  • Numerical methods
  • Transient and Unsteady Heat Transfer

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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