Wall Static Pressure Variation in Sudden Expansion in Cylindrical Ducts with Cavities for Supersonic Flow for Mach 1.58 and 2.06: a Fuzzy Logic Approach
K.M.Pandey1, Sushil Kumar2, Jyoti Prakash Kalita3
1Dr. K. M. Pandey, Mechanical Engineering, National Institute of Technology Silchar, Silchar, India.
2Sushil Kumar, Mechanical Engineering, National Institute of Technology Silchar, Silchar, India.
3Jyoti Prakash Kalita, Mechanical Engineering, National Institute of Technology Silchar, Silchar, India.
Manuscript received on February 15, 2012. | Revised Manuscript received on February 20, 2012. | Manuscript published on March 05, 2012. | PP: 372-378 | Volume-2 Issue-1, March 2012. | Retrieval Number: A0453022112/2012©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In this paper the analysis of wall static pressure variation has been done with fuzzy logic approach to have smooth flow in the duct. Here there are three area ratio chosen for the enlarged duct, 2.89, 6.00 and 10.00. The primary pressure ratio is taken as 2.65 and cavity aspect ratio is taken as 1 and 2. The study is analyzed for length to diameter ratio of 1,2,4 and 6. The nozzles used are De Laval type and with a Mach number of 1.74 and 2.23 and conical nozzles having Mach numbers of 1.58 and 2.06. The analysis based on fuzzy logic theory indicates that the length to diameter ratio of 1 is sufficient for smooth flow development if only the basis of wall static pressure variations is considered.
Keywords: Air ratio, De Laval nozzle, Mach number, pressure ratio, wall static pressure.