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Theoretical and Experimental Modeling of Vortex Engine in Ramjet Application

Besharat Shafiei, Somayeh | 2008

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39115 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Ghafourian, Akbar; Saeedi, Mohsen; Mozaffari, Ali Asghar
  7. Abstract:
  8. Heat transfer to combustion chamber walls is an unwanted phenomenon. Reduction of this heat transfer by using bidirectional swirl flow, as proved in past studies, can result in time and cost saving methods in design and fabrication of combustion chambers. Bidirectional Swirl flow, existing in vortex engine, maintains the chamber wall cool. This characteristic of such flow field, among with many other advantages for it, makes researchers more interested in studying the propulsion of it as well as its other applications. Bidirectional swirl flow in liquid fuel ramjet engines has the proven advantage of keeping the combustion chamber walls cool and in solid fuel ramjet engines in increasing the fuel burning rate as demonstrated in previous investigations. In this study a new experimental facility was designed, fabricated and tested to model and study the possibility of applying the bidirectional swirl flow field on the combustion chamber of an air breathing subsonic ramjet engine. Appropriate intake was designed with the capability to generate tangentional air flow into the combustion chamber. Inlets with appropriate angle guide this swirl flow into the chamber and create bidirectional swirl flow field in the combustion chamber. The chamber geometry was designed to allow formation of bidirectional swirl flow field in the combustion chamber. Propane and air were used as fuel and oxidizer respectively. The possibility of having air breathing bidirectional swirl flow and ramjet engine was proved experimentally. The temperature of combustion chamber wall was measured to be very low, below 100۫C. The temperature variations at 3 points of the combustion chamber wall of this air breathing bidirectional swirl flow engine were measured relative to time. The temperature variations on the same three points relative to various were measured and are reported. Further development of this type of combustion chamber enables manufacturers in a wide spectrum of industries to use less expensive and more available material in their production of combustors with improved combustion efficiency due to increased mixing rate
  9. Keywords:
  10. Ram Jet Engine ; Vortex Engine ; Supersonic Intake ; Subsonic Flow ; Bidirectional Swirl Flow ; Intake System ; Air Breathing Engine

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