Computational fluid dynamics simulations and validation of a novel constant volume combustion jet engine

Jeffrey T. Travis, Andrey V. Kuznetsov, William L. Roberts

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The constant volume combustion thermodynamic cycle, or Humphrey Cycle, if made practical in a jet engine, can provide enormous benefits over the traditional jet engine cycle, the Brayton Cycle, which is a constant pressure cycle. These advantages include increased thermal efficiency, lower specific fuel consumption, and higher specific impulse. Other just as important benefits inherent in a constant volume device include simplicity of design, the ability to miniaturize the device because of the simplicity, low cost, damage tolerance, expendability, and a high thrust-to-weight ratio. This device has the potential to provide extremely high thrust in an austere, economical package. All of these attributes, when proven feasible, have the ability to provide a propulsion source for military and civilian applications alike, including applications in miniaturized unmanned aerial vehicles (UAVs). The purpose of this study was to computationally model, validate and understand the physics of a possible constant volume combustion jet engine, including the combustion and fluid mechanics of such a device. Specifically, the investigation included studying different engine geometries, valve designs and timing, various air inlet and fuel mixing schemes, operating frequencies, along with the effects of a convective air stream when a supporting vehicle is in flight at various airspeeds. This investigation sought to maximize thrust and minimize fuel consumption, and thus develop a jet engine with many possible future applications.

Original languageEnglish (US)
Title of host publication52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624104060
StatePublished - 2016
Event52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016 - Salt Lake City, United States
Duration: Jul 25 2016Jul 27 2016

Other

Other52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016
CountryUnited States
CitySalt Lake City
Period07/25/1607/27/16

ASJC Scopus subject areas

  • Engineering(all)

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