Research

Subject Multi-disciplinary Investigation for Parachute Dynamics
Member Takayuki Minobe, Kohei Okamura
Purpose A parachute is widely used in various situation because of the distinguished drag-to-weight ratio. However, it is not clear how it may be traveled by the effect of the flow and the deformation. Therefore, the fluid-structure interaction phenomenon are investigated by using experimental studies and numerical studies in this group. The design optimization for a parachute is final goal.
Information Analysis of Parachute Kinetics

PIV Visualization around Parachute Model
Subject Study of Aneurysm from the Viewpoint of Fluid Dynamics
Member Rina Nishida, Takuma Baba
Purpose An aneurysm is significant disease that is caused by the deformation of the blood vessel. It is suggested that the disease can be occurred at the blanched location. Recently, it is treated by microcoil or stent installation and bypass operation. We are studying about these treatment from the viewpoint of the fluid dynamics of the blood vessel.
Information

PIV Visualization on Aneurysm Model
Subject Study of Flow Induced Vibration with Elastic Surface
Member Esmatullah Maiwand Sharify, Hiroki Saito, Taikan Harasawa
Purpose Flow-induced vibration may be caused around a blunt object by the Karman Vortices. For example, in an engineering plant or electric power plant, it can cause critical problem around sensors to check fluid properties, especially when the natural frequency is close to the vortex shedding frequency. Therefore, we are trying to solve the problem by using elastic surface. This research is performed by both experimental study and numerical study.
Information
Flow Visualization around Tandem Cylinder Supported by leaf spring


Fluid-Structure Interactive Vibration of Elastic Wall Object
Subject Design and Development of Flapping Wing Vehicle
Member Soshi Sumita, Mizuki Yamate, Yoshihiro Tajika
Purpose Today many researchers are studying about aerodynamics around flapping wing. The characteristics of the phenomenon is different from one of the conventional fixed wing. We are trying to exploit the flapping wing aerodynamics to realize vertical takeoff and landing.
Information

Flow simulation around 2D flapping wing
Subject Study of Complete Reusable Vertical Takeoff Rocket
Member Suguru Shimotashiro
Purpose Collaborative Research with JAXA
Recently, Reusable Vertical Takeoff (RVT) rocket is studied to reduce the operation cost. It is generally known that large flow separation is occurred in wake of an object at large angle of attack. In the case of the RVT, the flow feature should be controlled to perform turnover maneuver flight. Therefore, we validate the flow characteristics around RVT and investigate the realizability.
Information

Result of Oil Flow Experiment on RVT
Subject Aerodynamic Noise around Pantograph in High-speed Vehicle
Member Takaaki Mikaduki, Hiroaki Akai, Yasushi Takano, Takafumi Ozawa
Purpose Collaborative Research with RTRI
Aerodynamic noise is significant problem to realize high-speed vehicle, today. It is confirmed that a pantograph can be main noise source because it is exposed in high-speed flow. Then we investigate the flowfield around a pantograph by using flow simulation and wind tunnel experiment to reduce the aerodynamic noise.
The oscillation of body of a vehicle when it comes into a tunnel is another problem for a high-speed vehicle. One of the reason why the oscillation is occurred is flow separation from the body of a vehicle. Therefore, we investigate the precise phenomenon around a vehicle and the mechanism to suppress the oscillation efficiently.
Information

Flow Simulation around Vehicle in Tunnel and Result of PSP Experiment