Study on Environmental issues at Flight of Supersonic Aircraft

超音速飞机飞行环境问题研究

• 批准号: 05402053
• 负责人: KUBOTA Hiroshi
• 金额: $ 11.01万
• 依托单位: UNIVERSITY OF TOKYO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05402053/
• 关键词: Supersonic aircraft; Sonic-boom; Low sonic-boom design; Ozone layr; Storatosphere; Nitric oxygen; Airport noise; Engine noise; 環境課題; デルタ翼; 矢形翼; 窒素化合物; 超音速輸送機; アロ-(矢形)翼; ナビエストークス方程式; 対流圏

The following major results have been obtrained through research on (1) reduction of sonic-boom. (2) protection of ozone layr and (3) suppression of airport noise, which are environmental issues concerning the next generation supersonic aircraft.(1) Research on reduction sonic-boomThe effects of aircraft configuration and nose bluntness on sonic-boom intensity are investigated with use of near-field pressure distributions by wind tunnel experiment and computational fluid dynamics and extrapolation by "the wave form parameter method". It is verified that the far-field sonic-boom intensity for the low sonic-boom configuration optimally designed is well reduced.(2) Research on ozone layr chemistryConcentration changes of ozone and nitric oxygen are obtained by consideration of solution of two-dimensional equation of fluid motion in stratosphere and simplified chemical reaction of ozone/nitric oxigen. Preliminary experiment of ozone/nitric oxygen within a spac chamber simulating the stratosphere is executed.(3) Investigation of current status of technology of suppression of airport noiseCurrent status and future perspectives on airport noise estimation and engine noise suppression technology are overviewed. The noise reduction by flight operation is also reviewed.

通过对(1)减小音爆的研究，得到了以下主要结果。(2)保护臭氧层和抑制机场噪声，这是下一代超音速飞机的环境问题。(1)降低音爆的研究。利用风洞实验和计算流体力学的近场压力分布和“波形参数法”外推，研究了飞机外形和机头钝度对音爆强度的影响。(2)臭氧层化学研究通过求解二维平流层流体运动方程和简化臭氧/一氧化氮的化学反应，得到了臭氧和硝态氧的浓度变化。在模拟平流层的SPAC舱内进行了臭氧/硝氧的初步实验。(3)机场噪声抑制技术的研究现状综述了机场噪声估计和发动机噪声抑制技术的现状和发展前景。并对飞行降噪工作进行了综述。

项目成果

Kubota.H.: "Current Status and Future Perspectives of New Large Airplane and Super-Sonic Transport" Proc. of 1st International Aerospace Technomart. Seoul. Korea. 129-145 (1996)

Kubota.H.：“新型大型飞机和超音速运输机的现状和未来展望”Proc。

Makino. Y.: "Far-Field Sonic-Boom Prediction of 3-Demensional Aircraft Configurations." Preprints of Second Asia Workshop on Computational Fluid Dynamics. 265-269 (1996)

牧野。

久保田弘敏: "航空機の環境対策と新技術" 東京大学工学セミナー「環境と新技術---人にやさしい交通のために---」講演集. 31-38 (1994)

久保田浩：《飞机的环境措施与新技术》东京大学工学研讨会《环境与新技术---为了人民友好的交通---》讲座集31-38（1994）。

Kubota, H.: "Environmental Issues Related to Aircraft and Aerodynamic Technology" Journal of Japan Society for Aeronautical and Space Sciences.(to appear). (1997)

Kubota, H.：“与飞机和空气动力技术相关的环境问题”，日本航空航天学会杂志。（待发表）。

Makino,Y.: "The Effect of the Body Configuration on the Sonic-Boom Intensity" AIAA Paper 96-2466-CP. 691-697 (1996)

Makino,Y.：“身体结构对音爆强度的影响”AIAA 论文 96-2466-CP。