Experimental Facilities

The low-speed wind tunnel is capable of highly reliable wind tunnel testing. It is an Eiffel-type suction wind tunnel, minimizing noise in the test section. The test section has dimensions of 300 × 300 × 760 mm and can conduct experiments with a flow velocity of 5-60 m/s, with turbulence intensity below 0.5%. The test section can be easily reconfigured, making it suitable for various experiments such as aerodynamic measurements and visualization experiments.

This subsonic suction wind tunnel is driven by a 12 m³ vacuum tank as a low-pressure source. It is an atmospheric suction-type wind tunnel. The nozzle installed downstream of the test section allows control of the flow velocity in the test section. The test section has a cross-section of 150 mm × 100 mm, enabling visualization measurements of the flow around objects.

This device can reproduce supersonic jets with a maximum Mach number of approximately 2.1 by releasing compressed air into the atmosphere. It is used for research on exhaust flows of rocket engines and other applications.

The anechoic chamber is designed to suppress reflections of sound generated inside the room and is used for sound source exploration and other experiments. The internal dimensions are approximately 3 m × 3 m × 3 m. To accommodate various experiments, visualization windows are installed around 270 degrees of the anechoic chamber, allowing for visualization measurements from multiple directions.

*Note: This equipment was transferred from Tohoku University and is currently under restoration.*

This wind tunnel is capable of reproducing the extreme flow conditions of compressible low Reynolds number flows. The wind tunnel is housed within a vacuum chamber, enabling wind tunnel testing in a reduced-pressure environment. The test section has a rectangular cross-section of 150 mm × 100 mm and is driven by an ejector installed downstream. It is used for experiments simulating the flow around aircraft flying in the Martian atmosphere and for fundamental research on compressible low Reynolds number flows.

*Note: This equipment was relocated from Tohoku University and is currently under restoration.*

This device is used to investigate the pressure and temperature sensitivity of the pressure sensitive paint (PSP) that has been created. It can control the pressure inside the chamber installed at the bottom and the temperature of the stage where the sample plate is placed. The PSP is excited by an excitation light source installed at the top, and the static characteristics of the PSP are investigated by recording the emission intensity of the PSP at each pressure and temperature using a CCD camera. The device can calibrate within a pressure range of 0.3-300 kPa and a temperature range of 263-333 K (-10℃ to 60℃). Additionally, tests can be conducted with varying oxygen concentrations.

This device is used to investigate the response characteristics of the pressure sensitive paint (PSP) that has been created. Pressure fluctuations of 150-10,000 Hz are generated by a speaker installed at one end of the tube, and the response characteristics of the PSP are examined by comparing the response of the PSP and a semiconductor pressure sensor installed at the other end of the tube. The PSP is excited by a UV laser, and its emission is detected by a photomultiplier tube. The PSP's responsiveness can be examined in a pressure range down to 1 kPa below atmospheric pressure. The temperature of the PSP sample plate can also be controlled using a Peltier element.

This space is designated for the preparation and painting of pressure sensitive paint (PSP). The painting process is equipped with a local exhaust system to ensure safe operation.

In addition to PSP, this space is also used for the preparation of temperature sensitive paint (TSP) and oil for the fluorescent oil film method.

This device is used to create anodized pressure sensitive paint (PSP) films. It can perform sulfuric acid anodizing and phosphoric acid anodizing at controlled temperatures.

In sulfuric acid anodizing, it creates PSPs with a response frequency of approximately 5-10 kHz. In phosphoric acid anodizing, it creates PSPs with a response frequency of over 10 kHz.

This laser microscope is manufactured by KEYENCE. It is used to measure the thickness and surface roughness of pressure sensitive paint (PSP). The thickness of the PSP directly affects its responsiveness and emission intensity, and the surface roughness can induce unintended turbulence transition in high Reynolds number wind tunnel tests. Therefore, the condition of the paint film is thoroughly checked.

This spectrometer is manufactured by Shimadzu Corporation. It is used to measure the absorption and emission spectra of pressure sensitive paint (PSP).