Cylinder drag reduction by geometric modification in 3-Diameter confined space

Cylinder drag reduction by geometric modification in 3-Diameter confined space: Towards speed skiing application

Koradiya, Jaydeep (TU Delft Aerospace Engineering)

Sciacchitano, A. (mentor)

Delft University of Technology

Aerospace Engineering

2018-04-25

Cylinder flow has been extensively studied for decades due to its numerous direct and indirect relevance to the real-life applications. Being a bluff body, the cylinder experiences flow separation with large wake leading to significant drag force thus the drag reduction on the cylinder is sought. In the long-running history of cylinder flow, drag reduction is achieved by geometric modification, active/passive flow control techniques. The aim of this research is to investigate the drag reduction on the cylinder with the help of geometric modification and passive flow control devices. The geometric modifications are restricted to
be made only in the downstream direction from the cylinder leading point within the constrained space of 3 diameters. The constraints are inspired from speed skiing fairing design and other applications where a complete aerofoil cannot be fitted due to limited available space. The passive flow control devices like zigzag strip and vortex generator are implemented on the modified geometry to seek further drag reduction.

Cylinder aerodynamics
Non-intrusive drag determination
Particle Image Velocimetry

http://resolver.tudelft.nl/uuid:15c3cad6-9d97-44c4-b249-6f2c674c061c

Student theses

master thesis

© 2018 Jaydeep Koradiya