Drag Prediction in the Near Wake of a Circular Cylinder based on DPIV Data
Publish place: Journal of Applied Fluid Mechanics، Vol: 9، Issue: 4
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JAFM-9-4_038
تاریخ نمایه سازی: 3 بهمن 1400
Abstract:
This study focuses on drag prediction in the near-wake of a circular cylinder by use of mean velocity profiles and discusses the closest location where a wake survey would yield an accurate result. Although the investigation considers both the mean and fluctuating velocities, the main focus is on the mean momentum deficit which should be handled properly beyond a critical distance. Digital Particle Image Velocimetry (DPIV) experiments are performed in a Reynolds number range of ۱۰۰ to ۱۲۵۰. Wake characteristics such as vortex formation length (L) and wake width (t) are determined and their relations to drag prediction are presented. Drag coefficients determined by momentum deficit formula are found to be in good agreement with experimental and numerical literature data in present Reynolds number regime.
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Authors
O. Son
Department of Astronautical Engineering, Istanbul Technical University, Istanbul, ۳۴۴۶۹, Turkey
O. Cetiner
Department of Astronautical Engineering, Istanbul Technical University, Istanbul, ۳۴۴۶۹, Turkey