Drag measurement of different car bodies via balance technique and momentum integral method

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2014

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Çaylan, Gülsüm

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In this thesis study, Ahmed Body and MIRA Notchback model were investigated experimentally. The drag coefficients of reference models were measured at three different Reynolds number via balance technique. The wakes of reference models were also investigated and the suitable location in order to measure the drag coefficient was determined via momentum integral method. Surface pressure of two different types of vehicle models was measured at three different Reynolds number. The wakes of Ahmed Body which has blunter shapes and sharp edges and MIRA Notchback model were investigated qualitatively by using laser and smoke and photographed. As a conclusion, it was investigated that for Ahmed Body model the drag coefficient increased as the Reynolds number increases, for MIRA Notchback model the drag coefficient decreased while the Reynolds number increases within the investigated limits.

Subject Keywords

Drag (Aerodynamics), Automobiles, Automobiles, Automobiles

URI

http://etd.lib.metu.edu.tr/upload/12616838/index.pdf
https://hdl.handle.net/11511/23312

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

G. Çaylan, “Drag measurement of different car bodies via balance technique and momentum integral method,” M.S. - Master of Science, Middle East Technical University, 2014.