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


Journal Article

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. © 1998 by ASME.

Full Text

Duke Authors

Cited Authors

  • Shi, X; Knio, OM; Katz, J

Published Date

  • January 1, 1998

Published In

Volume / Issue

  • 120 / 1

Start / End Page

  • 58 - 64

Electronic International Standard Serial Number (EISSN)

  • 1528-8943

International Standard Serial Number (ISSN)

  • 0022-1481

Digital Object Identifier (DOI)

  • 10.1115/1.2830065

Citation Source

  • Scopus