It is Koji Okamoto, a faculty member of Advanced Energy Engineering. Usually, I do not have a habit of writing blogs etc, so I’m worried about what to write in such a place, but as with other people, it is better to introduce my laboratory for the first time as well I think, I would like to write it easily.
Our laboratory focuses on thermal fluid field targeting rocket engine, jet engine, gas turbine. However, rather than the conventional engine itself, it is a stance that we want to make a better engine by introducing a slightly different idea. Actually, this year, more than half of the students have changed since last year, so I feel newly starting new year.
Last week I attended the 49 th annual general meeting of Japan Airlines and Space Science Association held at Komaba Campus and annual meeting lecture. I also wrote about major in newspaper, but Mr. Masahito Akamine of our laboratory who obtained his doctorate in March this year received the Japan Energy Aerospace Association Encouragement Prize, and the award ceremony and a memorial lecture were held . For this young age under 35 years old, this encouragement prize is selected about 2 to 3 articles each year from among journal articles published in academic journals, the following paper was chosen this time.
Masahito Akamine, Koji Okamoto, Susumu Teramoto, Takeo Okunuki, and Seiji Tsutsumi, “Conditional Sampling Analysis of Acoustic Phenomena from a Supersonic Jet Impinging on an Inclined Flat Plate,” Transactions of the Japan Society for Aeronautical and Space Sciences, Vol. 59, No. 5, pp. 287-294, 2016.
In this paper, we focus on the case where supersonic jet collides with the wall, visualize the jet noise generated from it, and acoustically analyze the high-speed visualized moving image, from which place the sound wave travels We are proposing a method that will make it easier to see if it is occurring. Measurement using microphones is common when we say noise measurement, but when we use this method, it becomes clear at a glance where the noise is generated (below figure), so we expect to be of great help in thinking about the method of noise reduction doing.
The results published in this paper were all obtained from experiments conducted in the hypersonic high enthalpy wind tunnel in the experiment building of Kashiwa Campus. I think that I am also very happy as an academic advisor because I have evaluated the data that I took by struggling for many years and I hope for the future success of Akine. I hope that you will be able to produce various interesting results from now on.
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Thank you in advance for your kind understanding.