Search

Results: 403
Guan Yu
Noga Ganany
Dec 09, 2019
A critical study of the rich religious tradition surrounding Guan Yu 關羽 (Guandi 關帝 / Guangong 關公 / Lord Guan) was long overdue. Bared ter Haar’s recent book rises up to the task with commendable thoroughness, a tour de force of...
Published by:
Research and Application of Encryption System Based on Quantum Circuit for Mobile Internet Security
Nowadays, the IoT technology is developing rapidly. In order to protect the information security of the IoT, this paper applies the characteristics of quantum circuit, such as high complexity and no feedback, into the field of...
System Dynamics Modeling Of Socioeconomic Development Mode Associated With Water Usage In Baiyangdian Lake, Northern China
With continual increase of environmental pressure from human activities, it has become necessary to study the process of socioeconomic water usage influencing the water quality. Based on the system dynamic model developed before...
Flow control of tip/edge vortices
Ismet Gursul, Zhijin Wang
May 01, 2018

Location, strength, and structure of tip and edge vortices shed from wings and bodies can be manipulated by using flow control techniques. Flow physics of these approaches involve flow separation from the edge, roll-up into...

Published by:
System Dynamics Modeling Of Socioeconomic Development Mode Associated With Water Usage In Baiyangdian Lake, Northern China
With continual increase of environmental pressure from human activities, it has become necessary to study the process of socioeconomic water usage influencing the water quality. Based on the system dynamic model developed before...
Thrust enhancement due to flexible trailing-edge of plunging foils
Drag reduction for hydrofoils is studied through thrust generation on foils plunging at low Strouhal numbers in order to simulate the action of the ocean waves. Force, deformation and flow field measurements are presented for a...
Published by:
Lift Enhancement of a Stationary Wing in a Wake
A stationary wing placed in the wake of a bluff body experiences lift enhancement. The quasi-periodic flow in the wake causes excitation of the separated flow in the post-stall conditions. The increase in the time-averaged lift...
Published by:
Self-excited flag vibrations produce post-stall flow control

We present experiments demonstrating that a small flag attached to the surface of an airfoil near the leading edge exhibits self-excited oscillations when the airfoil is set at a post-stall angle of attack. The limit cycle...

Published by:
Control of Upswept Afterbody Vortices Using Continuous and Pulsed Blowing

Anexperimental study was performed in a water tunnel to evaluate the effects of continuous and pulsed blowing jets on the counter-rotating vortices generated by the afterbody of a slanted base cylinder. Drag reductions from...

Published by:
Aerodynamics of a wing in turbulent bluff body wakes

The aerodynamics of a stationary wing in a turbulent wake are investigated. Force and velocity measurements are used to describe the unsteady flow. Various wakes are studied with different dominant frequencies and length...

Published by:
Modified near-wakes of axisymmetric cylinders with slanted base
Near-wakes of axisymmetric cylinders with slanted base were investigated in wind tunnel experiments for an upsweep angle of 28°. Effects of splitter-plate, cavity, and flaps on the afterbody vortices and separated flow were...
Published by:
Self-excited flag vibrations produce post-stall flow control

We present experiments demonstrating that a small flag attached to the surface of an airfoil near the leading edge exhibits self-excited oscillations when the airfoil is set at a post-stall angle of attack. The limit cycle...

Published by:
Interaction of Vortex Streets with a Downstream Wing
The unsteady aerodynamics of a wing in the wake of a periodically plunging upstream airfoil was investigated in water tunnel experiments. By varying the frequency and the amplitude of the plunge oscillations, vortex-street...
Published by:
Flow control of tip/edge vortices
Ismet Gursul, Zhijin Wang
May 01, 2018

Location, strength, and structure of tip and edge vortices shed from wings and bodies can be manipulated by using flow control techniques. Flow physics of these approaches involve flow separation from the edge, roll-up into...

Published by:
Effect of pre-strain and excess length on unsteady fluid-structure interactions of membrane airfoils
Aerodynamic characteristics of two-dimensional membrane airfoils were experimentally investigated in a wind tunnel. The effects of the membrane pre-strain and excess length on the unsteady aspects of the fluid-structure...
Published by:
Lift Enhancement of a Stationary Wing in a Wake
A stationary wing placed in the wake of a bluff body experiences lift enhancement. The quasi-periodic flow in the wake causes excitation of the separated flow in the post-stall conditions. The increase in the time-averaged lift...
Published by:
Unsteady characteristics of inlet vortices
Zhijin Wang, I. Gursul
Oct 01, 2012
An experimental study of the unsteady characteristics of inlet vortices has been conducted using a high-frame rate digital particle image velocimetry system. The results revealed the formation of a pair of counter-rotating inlet...
Published by:
Unsteady characteristics of inlet vortices
Zhijin Wang, I. Gursul
Oct 01, 2012
An experimental study of the unsteady characteristics of inlet vortices has been conducted using a high-frame rate digital particle image velocimetry system. The results revealed the formation of a pair of counter-rotating inlet...
Published by:
Three-dimensional measurements of vortex breakdown
Leading-edge vortex formation and breakdown have been measured over a periodically plunging non-slender delta wing at a high angle of attack, using a three-dimensional particle-tracking method. A very rare type of vortex...
Published by:
Control of Upswept Afterbody Vortices Using Continuous and Pulsed Blowing

Anexperimental study was performed in a water tunnel to evaluate the effects of continuous and pulsed blowing jets on the counter-rotating vortices generated by the afterbody of a slanted base cylinder. Drag reductions from...

Published by:
Drag Reduction by Manipulation of Afterbody Vortices
Drag force, surface pressure and particle image velocimetry measurements have
been carried out in wind tunnel experiments in order to study the effect of minispoilers on the drag of an axisymmetric cylinder with a slanted...
Published by:
Coherence of unsteady wake of periodically plunging airfoil

We present an experimental investigation of the flow structure in the near wake of a NACA0012 airfoil plunging sinusoidally at a chord Reynolds number of Re = 20 000 and for a wide range of reduced frequency k and Strouhal...

Published by:

|<

<

1

2

3

4

5

>

>|