International Journal of Engineering، جلد ۲۸، شماره ۲، صفحات ۳۰۵-۳۱۳
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عنوان انگلیسی Numerical Study on Improvement of Hydrofoil Performance using Vortex Generators (RESEARCH NOTE)
چکیده انگلیسی مقاله In this paper the effects of rigid triangular passive vortex generators on a hydrofoil were investigated numerically. In the first step using the Finite Volume Method the bare hydrofoil were modeled and the results of lift and drag coefficients were validated using experimental data. In the next step the hydrofoil armed with vortex generators was modeled and its effect on the hydrofoil performance was examined. In the next step by introducing a source term into the momentum equation the vortex generators effect was considered. However their geometry was completely removed. The results showed that this can significantly decrease the computational memory and calculation time. The results also revealed that the use of vortex generators can delay the stall conditions by increase the stall angle leading to a higher lift coefficient in new stall angle and decreasing the drag coefficient. In a case study on NACA 0012 section profile results showed that the use of vortex generators increases the stall angle by 4 degrees and the lift coefficient at this point by 37%.
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نویسندگان مقاله Hassan Ghassemi |
Marine Engineering Department, Amirkabir University of Technology

Mohammad Javad Ketabdari |
Marine Engineering Department, Amirkabir University of Technology

Arash Ashrafi |
Marine Engineering Department, Amirkabir University of Technology

نشانی اینترنتی http://www.ije.ir/article_72458_e753c516acd9dc55726e5b2e34580a9c.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/409/article-409-2062591.pdf
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