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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

Author(s): K.M.Pandey | Sushil Kumar | Jyoti Prakash Kalita

Journal: International Journal of Soft Computing & Engineering
ISSN 2231-2307

Volume: 2;
Issue: 1;
Start page: 372;
Date: 2012;
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Keywords: air ratio | De Laval nozzle | Mach number | pressure ratio | wall static pressure.

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.
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