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Investigation of Effective Parameters on Propulsion in a Vortex Engine

Golbafian, Hamid Reza | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41894 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Mozafari, Ali Asghar; Saidi, Mohammad Hassan; Ghafourian, Akbar
  7. Abstract:
  8. Vortex flow is one of the most sophisticated fluid movements in nature which has great industrial and scientific importance. In this dissertation, in order to study the combustion process due to a vortex flow, a new experimental model of a cold wall vortex engine, was designed, fabricated and tested with oxidizer issuing tangentially toward the end of the chamber. The cold wall effect in these chambers is a result of the cool layer of oxidizer which significantly reduces the amount of heat transfer to the chamber’s wall. This experimental model was designed to withstand the massive temperature rise resulting from the usage of Polyethylene as fuel and Nitrous oxide as oxidizer. In a series of tests with the usage of thermocouples the wall and exhaust gas temperature was recorded and the rate of heat transfer to the walls were observed. The amount of consumed polyethylene was measured in different tests with different ratios of oxidizers. By fabricating different exhaust nozzles, in order to measure the amount of thrust force introduced in the chamber, a series of tests was conducted and effect of different parameters on thrust force was observed. With the results of these tests, it was observed that Nitrous Oxide can improve the rate of oxidization with Polyethylene and will result in combustion temperature rise in the chamber. It was also observed that in a same flow rate of both of the oxidizers, Nitrous Oxide has greater effect on the wall cooling of the chamber. With the thrust tests we concluded that the change in the rate of thrust force versus the oxidizers’ tangential velocity will rise in a linear manner
  9. Keywords:
  10. Vortex Combustion Chamber ; Vortex Engine ; Cold Wall Engine ; Polyethylene Fuel ; Nitrous Oxide

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