著者
羽野 洋平 久保 幸一 金元 敏明
出版者
一般社団法人日本機械学会
雑誌
流体工学部門講演会講演論文集 (ISSN:13482882)
巻号頁・発行日
vol.2009, pp.405-406, 2009-11-06

The authors invented the unique wind power unit composed of the large-sized front wind rotor, the small-sized rear wind rotor and the peculiar generator with the inner and the outer armatures. The rotational torques of both armatures/wind rotors are counter-balanced, while the rotational speeds and the directions are adjusted automatically in response to the wind conditions. The prototype unit is composed of the tandem wind rotors, whose front and rear diameters are 2 m and 1.33 m, and the double rotational armatures type synchronous generator. The unit was setup at the roof of an isolated building at Kitakyushu city in Japan. The field test results proved that this type unit may be effective to get the sufficient output if the profiles of the wind rotors and the peculiar generator are optimized.
著者
村松 旦典 柴田 明 熊沢 実樹
出版者
一般社団法人日本機械学会
雑誌
流体工学部門講演会講演論文集 (ISSN:13482882)
巻号頁・発行日
vol.2009, pp.59-60, 2009-11-06

Side jets, which are radial ejections, are formed at a near field in the low-density jet, such as a helium gas jet. Mixing of fluids between the jet and the ambient is enhanced at vicinity of the nozzle exit by the side jets. When the side jets are generated in a helium gas jet, the jet has periodically large velocity fluctuation in the potential core. The side jets were produced in uniform density jets by inputting periodic pulsation with a loudspeaker. The side jets in the pulsed air jets were visualized by using planar laser Mie scattering(PLMS), and the condition for generation of side jets was shown by the turbulent intensity, Reynolds number and non-dimensional frequency. Power spectra of velocity fluctuation in the pulsed air jet are similar to those in the helium gas jet if the side jets are generated.