Liquid Fuel Film Cooling: A CFD Analysis With Hydrocarbon Fuel
Abstract
Cooling of liquid rocket engine combustion chambers and nozzles is a critical component to liquid rocket engine design. A common method of cooling is liquid fuel lm cooling. Liquid fuel is injected along the surface of the wall to act as a barrier against the core combustion gases. A numerical model is developed for simulating liquid fuel lm cooling in a rocket engine using a hydrocarbon fuel. The model incorporates turbulent multiphase flow with species transport within the commercial ANSYSR Fluent CFD software. Conjugate heat transfer is simulated through walls containing embedded cooling channels. A novel User Defined Function is written to incorporate heterogeneous chemical reactions between the liquid fuel and the freestream gases. Comparisons are made between simulations with and without the heterogeneous reactions as well as with simplifications to the cooling channel geometry. It is found that simplifications to the cooling geometry can artificially reduce cooling performance while neglecting the heterogeneous reactions can artificially increase cooling performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 24, 2016
- Accession Number
- AD1054144
Entities
People
- Jacob D. Bills
Organizations
- Air Force Institute of Technology