High Fidelity Measurement and Modeling of Interactions between Acoustics and Heat Release in Highly-Compact, High-Pressure Flames
Abstract
The defining characteristics of advanced chemical propulsion systems include very high rates of volumetric energy deposition, and very small combustor sizes. These characteristics give rise to extremely compact interactions in space and time between the chamber acoustic modes and unsteady heat release modes that may result in combustion instability. This project seeks to better understand the coupling mechanisms between heat release, hydrodynamics, and acoustics, and to develop tools to study the problem. High-fidelity simulations using large eddy simulations and reduced reaction kinetics are providing insight into unsteady reacting flows at an unprecedented level, providing some hope that a priori predictions will be possible in the next decade. Important questions include the accuracy of prediction that is required, and the level of modeling that is required for that prediction. The simulations must also be validated with experimental data. However, the time and length scales, and energy deposition rates in the canonical laboratory flames that have been studied over the past two decades are orders of magnitude different than the environments encountered in practical rocket combustors. The main objective of this study is to obtain high-fidelity experimental data critically needed to validate research codes at relevant conditions, and to develop systematic and rigorous means for comparison.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 24, 2016
- Accession Number
- AD1011584
Entities
People
- William E Anderson
Organizations
- Purdue University