EXPERIMENTAL STUDY ON THE DRAG COEFFICIENT AND FLOW STRUCTURE OF AN AXIALLY SYMMETRIC MODEL AND FACTORS AFFECTING IT, IN WIND TUNNEL

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ESFANDEH SAEED; KHORASANI SAFFAR ALI; DEHGHAN ALIAKBAR; SHEIKHZADEH GHANBAR ALI; JAMALI MAHDI

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:7 Page(s): 71-82

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Title

EXPERIMENTAL STUDY ON THE DRAG COEFFICIENT AND FLOW STRUCTURE OF AN AXIALLY SYMMETRIC MODEL AND FACTORS AFFECTING IT, IN WIND TUNNEL

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Keywords

AXIALLY SYMMETRIC MODELQ1

WAKEQ1

WIND TUNNELQ2

HOT WIREQ2

DRAG COEFFICIENTQ1

Abstract

The present study was done to evaluate the effect of parameters like trip strip installation, free stream velocity, geometry of model nose (SUBBOF nose and DRDC nose) and putting up model in pitch and yaw angle, on DRAG COEFFICIENT. Also, the effect of stand geometry of an AXIALLY SYMMETRIC MODEL in WIND TUNNEL on WAKE flow structure and DRAG COEFFICIENT in zero and ten degree angles of attack was investigated. Choosing the best distance behind the model for data acquisition in order to calculate DRAG COEFFICIENT under consideration of turbulence effects in one dimension is the other item investigated in present study. All experiments have been done in an open circuit WIND TUNNEL at university of Yazd and data acquisitions has been done with a one dimensional HOT WIRE. According to calculations, installation of trip strip enhanced DRAG COEFFICIENT in all cases. Also, DRAG COEFFICIENT decreased with increasing free stream velocity. Putting up the model in pitch and yaw angle of attack increased DRAG COEFFICIENT. Between two nose shapes that were tested, the SUBBOF nose shape was chosen as suitable nose. A stand with NACA0012-64 geometry and Rod stand were selected as the most appropriate stands for zero and 10 degree angles of attack.

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APA: Copy

ESFANDEH, SAEED, KHORASANI SAFFAR, ALI, DEHGHAN, ALIAKBAR, SHEIKHZADEH, GHANBAR ALI, & JAMALI, MAHDI. (2016). EXPERIMENTAL STUDY ON THE DRAG COEFFICIENT AND FLOW STRUCTURE OF AN AXIALLY SYMMETRIC MODEL AND FACTORS AFFECTING IT, IN WIND TUNNEL. MODARES MECHANICAL ENGINEERING, 16(7), 71-82. SID. https://sid.ir/paper/178315/en

Vancouver: Copy

ESFANDEH SAEED, KHORASANI SAFFAR ALI, DEHGHAN ALIAKBAR, SHEIKHZADEH GHANBAR ALI, JAMALI MAHDI. EXPERIMENTAL STUDY ON THE DRAG COEFFICIENT AND FLOW STRUCTURE OF AN AXIALLY SYMMETRIC MODEL AND FACTORS AFFECTING IT, IN WIND TUNNEL. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(7):71-82. Available from: https://sid.ir/paper/178315/en

IEEE: Copy

SAEED ESFANDEH, ALI KHORASANI SAFFAR, ALIAKBAR DEHGHAN, GHANBAR ALI SHEIKHZADEH, and MAHDI JAMALI, “EXPERIMENTAL STUDY ON THE DRAG COEFFICIENT AND FLOW STRUCTURE OF AN AXIALLY SYMMETRIC MODEL AND FACTORS AFFECTING IT, IN WIND TUNNEL,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 7, pp. 71–82, 2016, [Online]. Available: https://sid.ir/paper/178315/en

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