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http://dx.doi.org/10.5139/JKSAS.2020.48.3.207

Design of a Shape Transition Nozzle for Lab-scale Supersonic Combustion Experimental Equipment  

Sung, Bu-Kyeng (Department of Aerospace Engineering, Pusan National University)
Hwang, Won-Sub (Department of Aerospace Engineering, Pusan National University)
Choi, Jeong-Yeol (Department of Aerospace Engineering, Pusan National University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.48, no.3, 2020 , pp. 207-215 More about this Journal
Abstract
Design of a shape transition nozzle is carried out as a part of building a lab-scale supersonic combustion experimental equipment. In order to connect directly the circular shaped vitiation air heater to the square shaped scramjet combustor, area change is evaluated by using the method of characteristics. Shape transition function is introduced to control the transition rate. Boundary layer correction was made through the three-dimensional computational fluid dynamics with the assessment on the several shape transition functions. The shape transition nozzle is proved minimizing the growth of boundary layer at the center of the rectangular nozzle surfaces that caused by the pressure gradient at the corners of the rectangular nozzle and the following recirculation regions.
Keywords
Circular to Rectangular Shape Transition Nozzle(CRST Nozzle); Method of Characteristics(MOC); Boundary Layer Correction; Vitiation Air Heater(VAH);
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