Analysis of transcritical spray phenomena in turbulent mixing layers

Joseph C. Oefelein, Vigor Yang

Research output: Contribution to conferencePaperpeer-review

17 Citations (Scopus)

Abstract

This paper focuses on the simulation of high-pressure, multiphase, combustion dynamics typically observed in contemporary propulsion and power-generation systems. Emphasis is placed on supercritical processes. A brief assessment of the current state of the art is provided which outlines the fundamental difficulties associated with modeling various processes at high pressure. A set of sample calculations are then presented to demonstrate the current state of the art with respect to modeling inert spray field dynamics at supercritical pressures. Here, a systematic analysis of high-pressure spray field dynamics in two-dimensional mixing layers is presented. Consistent closure methodologies are specified such that small scale turbulence and multiphase interactions are handled in a fully coupled manner over a wide range of thermodynamic regimes. Turbulence is modeled using the large-eddy-simulation technique. Spray field evolution is modeled using a set of recently developed correlations which describe unsteady droplet dynamics in high-pressure, convective environments. A detailed property evaluation scheme is employed coupled with an optimal numerical framework which takes full account of thermodynamic nonidealities and transport anomalies in the explicit, implicit, and preconditioning operators. Conclusions are drawn accordingly. Future calculations will incorporate a detailed combustion model along with a systematic analysis of the interrelation between fluid dynamic and physico-chemical processes over a wide range of pressures.

Original languageEnglish
Publication statusPublished - 1996
Event34th Aerospace Sciences Meeting and Exhibit, 1996 - Reno, United States
Duration: 1996 Jan 151996 Jan 18

Conference

Conference34th Aerospace Sciences Meeting and Exhibit, 1996
CountryUnited States
CityReno
Period96-01-1596-01-18

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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