Date of Award

2021

Document Type

Thesis

Degree Name

Master of Science in Engineering (MSE)

Department

Mechanical and Aerospace Engineering

Committee Chair

Robert A. Frederick, Jr

Committee Member

Kunning G. Xu

Committee Member

David Lineberry

Subject(s)

Rocket engines--Design and construction., Detonation waves.

Abstract

Rotating Detonation Engines (RDEs) have the potential to provide higher propulsive performance compared to conventional deflagrative combustors. The objective of this study is to compare liquid propane (LC3H8) and gaseous methane (GCH4) fuels in a laboratory-scale RDE. To accomplish this objective, a 4-inch, “racetrack” type RDE was developed that facilitates optical access to the combustion region. Fuels are injected, along with gaseous oxygen (GO2), using 50 discrete GO2-centered shear-coaxial injector elements. The design approach for the engine is discussed including combustor channel sizing, injector selection, ignition method, and instrumentation. Counter-propagating detonation waves were observed during testing with average wave velocities ranging from 3199 to 3527 ft/sec (975 to 1075 m/sec) with LC3H8, and 3447 to 4680 ft/sec (1051 to 1426 m/sec) with GCH4. The highest average wave velocities observed were achieved at equivalence ratios of approximately 1.75 to 1.8 for both fuels tested.

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.