An Experimental Investigation of the Whistler Nozzle and an Analytical Investigation of a Ring Wing in Supersonic Flow
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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This thesis consists of two parts. First, an experimental investigation of a new device called the whistler nozzle was conducted. Experiments were conducted in the areas of nozzle efficiency, mass entrainment, and flow visualization. Flow visualization showed the presence of a Coanda type jet wall interaction in the nozzle collar. Thrust efficiencies indicated that whistling could be achieved without much greater losses than the basic axisymmetric jet. Entrainment tests were inconclusive regarding the whistler nozzle performance. Second, supersonic flow past an oscillating cylindrical shell is analyzed using linearized characteristics methods. Pressure distributions and generalized aerodynamic forces are calculated and presented for various radius to length ratios and reduced frequencies. Good agreement is obtained in the two dimensional limiting case with previous work by Platzer, and an early solution of the steady cylindrical case by Zierep.
- Fluid Mechanics