Study of base pressure behavior in a suddenly expanded duct at supersonic Mach number regimes using statistical analysis

• Autorzy: Quadros J. D. , Khan S. A. , Antony A. J.

Identyfikatory

DOI

10.17512/jamcm.2018.4.07

• Języki publikacji: EN

Abstrakty

EN

The present experimental evaluation deals with the behavior of base pressure (BP) in a suddenly expanded duct at supersonic Mach number regimes. The experiments have been conducted for two cases viz. Without and with the use of microjets or active control. The plan of experiments was planned as per Taguchi design of experiments for acquiring data in a controlled manner. An L27 orthogonal array and analysis of variance (ANOVA) has been employed to investigate the contribution (in terms of percentage) of distinct process parameters like Mach number (M), Nozzle Pressure Ratio (N), Area Ratio (A) and their interactions affecting base pressure. The correlation between these parameters affecting base pressure has been obtained using multiple linear regression analysis. It has been concluded that the Mach number and area ratio were the factors that had high statistical significance on the behavior of base pressure for both cases. The performances of the developed linear regression models have been validated for accuracy prediction by use of 15 test cases. The performance of both the base pressure models was found to be better with percentage prediction in deviation lying in the range of –12.92% to +15.88% for base pressure without control and –10.27% to +19.23% for base pressure with control.

Słowa kluczowe

EN

Mach number; Taguchi; nozzle pressure ratio; area ratio

PL

liczba Macha; eksperyment Taguchi; model regresji liniowej; stosunek powierzchni

• Wydawca: Wydawnictwo Politechniki Częstochowskiej
• Czasopismo: Journal of Applied Mathematics and Computational Mechanics
• Rocznik: 2018
• Tom: Vol. 17, nr 4
• Strony: 59--72
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Quadros J. D.

• Department of Mechanical Engineering, Birla Institute of Technology, Offshore campus Ras-Al-Khaimah, UAE

autor

Khan S. A.

• Department of Mechanical Engineering, International Islamic University Malaysia Kuala Lampur, Malaysia

autor

Antony A. J.

• Department of Mechanical Engineering, Bearys Institute of Technology Mangalore, India

Bibliografia

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• [17] Quadros, J.D., Khan, S.A., & Antony, A.J. (2018). Modelling of suddenly expanded flow process in supersonic mach regime using design of experiments and response surface methodology. Journal of Computational Applied Mechanics, 49(1), 149-160.
• [18] Moinuddin, K.A.M., Joubert, P.N., & Chong, M.S. (2004). Experimental investigation of turbulence-driven secondary motion over a streamwise external corner. Journal of Fluid Mechanics, 511, 1-23.
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• [22] Quadros, J.D., Khan, S.A., & Antony, A.J. (2017). Investigation of effect of process parameters on suddenly expanded flows through an axi-symmetric nozzle for different Mach Numbers using Design of Experiments. IOP Conference Series: Materials Science and Engineering, 184(1), 1-8.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).