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Volume 31, Issue 5
Displaying 1-7 of 7 articles from this issue
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Chisachi KATO2003 Volume 31 Issue 5 Pages 258-265
Published: May 10, 2003
Released on J-STAGE: July 11, 2011
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Masato FURUKAWA2003 Volume 31 Issue 5 Pages 266-271
Published: May 10, 2003
Released on J-STAGE: July 11, 2011
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Masahiro NAKAO, Takashi AOYAMA, Naoki UCHIYAMA2003 Volume 31 Issue 5 Pages 272-277
Published: May 10, 2003
Released on J-STAGE: July 11, 2011
JOURNAL FREE ACCESSIn a high-speed forward flight of a helicopter, HSI (High Speed Impulsive) noise is known to be generated from the advancing blade tip. The noise is related to the existence of shock waves at blade surfaces and the region out of the blade tip. In this paper, the noise prediction methods associated with a CFD (Computational Fluid Dynamics) code and acoustic code are presented. CFD is suitable tool to capture shock waves and give good resolution of pressure distribution around rotor blade. Two types of wave equations; Kirchhoff equation and FW-H (Ffowcs Williams and Hawkings) equation are used to calculate sound propagation. For aeroacoustic code validation, a wind tunnel test was conducted in NAL low speed wind tunnel and sound pressure histories were obtained with 2.4m diameter 2-bladed rotor. Comparison between the wind tunnel test results and the numerical results shows good agreement.View full abstractDownload PDF (4832K) -
Takashi AOYAMA, Akio OCHI, Natsuki KONDO2003 Volume 31 Issue 5 Pages 278-286
Published: May 10, 2003
Released on J-STAGE: July 11, 2011
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Takeshi TOI2003 Volume 31 Issue 5 Pages 287-293
Published: May 10, 2003
Released on J-STAGE: July 11, 2011
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Kazunogawa Power StationMorihito INAGAKI, Mitsuo IIZUKA2003 Volume 31 Issue 5 Pages 305-308
Published: May 10, 2003
Released on J-STAGE: July 11, 2011
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Sigeru YAGI, Hidehito UMEMURA, Yoshiteru TANIGAWA, Akio IDO, Tomoyori ...2003 Volume 31 Issue 5 Pages 309-317
Published: May 10, 2003
Released on J-STAGE: July 11, 2011
JOURNAL FREE ACCESSDownload PDF (7449K)
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