Iida and Yokoyama Lab.

Pressure sensitivie patint
To measure the unsteady pressure on the rotating fan blades, the measurement methods for the pressure sensitive paint are developped.	Experimental setup	Visualized pressure

High-speed PIV
Flow fields are clarified by high-speed PIV. As a result, the aerodynamical noise sources are identified.	Experimental setup	Aerodynamical noise
Publications 1. Touki Uda, Akinobu Nishikawa, Satoshi Someya and Akiyoshi Iida, "Prediction of aeroacoustic sound using the flow fieldobtained by time-resolved particle image velocimetry",Measurement Science and Technology,22(7), pp.075402.1-075402.10IOP 2. Nobuhiro Yamazaki, Akinobu Nishikawa, Touki Uda, Takehisa Takaishi, and Akiyoshi Iida, "Experimental Evaluation Methods ofAeroacoustic Noise Based on Time Series Analysis of Flow Field",Journal of Environment and Engineering,6(2), pp.380-290J-STAGE 3. Hiroshi Yokoyama and Chisachi Kato, "Fluid-acoustic interactions in self-sustainedoscillations in turbulent cavity flows. I. Fluid-dynamic oscillations,"Physicsof Fluids21, 105103 (2009).AIP

High-accuracy aeroacoustic simulation
To establish the methods of aeroacoustic simulation with high accuracy and low cost, hybrid and direct simulations are performed.	Acoustic fields	Comparison of direct andhybrid simulations
Publications 1. Hiroshi Yokoyama and Akiyoshi Iida, "Aerodynamic Sound Sources from Flows around aRectangular Cylinder with a Low MachNumber",Transactions of the Japan society ofmechanical engineers Series B,79(799), pp.344-366, 2013. (in Japanese)J-STAGE