Graduation Semester and Year
2017
Language
English
Document Type
Thesis
Degree Name
Master of Science in Aerospace Engineering
Department
Mechanical and Aerospace Engineering
First Advisor
Frank Lu
Abstract
Filling of reactants into a pulsed detonation engine (PDE) should be carried out quickly because any lengthening of the fill time will lead to an increased cycle time. The fill process and, the purge process constitutes a large proportion of time in a cycle. The purpose of this research was to improve the time of fill by implementing various injection geometries in two injection schemes with five different premixed stoichiometric fuel-air mixture injected at wide range of velocity. The different configurations examined were end wall injection, side wall injection with ports angled and normal to the flow direction and staggered side wall injection. The two injection schemes were simultaneous injection and phased injection through side wall ports. The fuel choices were biogas, hydrogen, methane, propane and octane, all in the gaseous state. The oxidizer considered was air and pre-mixed with fuels. Numerical modeling was carried out using the commercial software Fluent as the mesh generation tool and flow solver, solving the Reynolds--averaged Navier--Stokes equations with a k-E turbulence model. The normal sidewall injection yielded the shortest fill time while staggered injection resulted in good fill uniformity. Angled upstream injection resulted in the most advantage with low time of fill, good fill uniformity and moderate spillage. Future improvements were suggested.
Keywords
Purging, PDE, Pulse detonation engine, Fuel filling, Multiphase flow, CFD
Disciplines
Aerospace Engineering | Engineering | Mechanical Engineering
License
This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 4.0 International License.
Recommended Citation
Umapathy, Nirmal Kumar, "MULTIPHASE FLOW MODELING AND ANALYSIS OF PHASED FILLING PROCESS FOR PULSED DETONATION ENGINE" (2017). Mechanical and Aerospace Engineering Theses. 938.
https://mavmatrix.uta.edu/mechaerospace_theses/938
Comments
Degree granted by The University of Texas at Arlington