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1. 发明专利

JP2003294301A Noise suppression type rotary nose 有权
标题翻译：噪声抑制型旋转噪声
公开(公告)号：JP2003294301A
公开(公告)日：2003-10-15
申请号：JP2002095780
申请日：2002-03-29
申请人： National Aerospace Laboratory Of Japan , 独立行政法人航空宇宙技術研究所
发明人： ISHII TATSUYA , OINUMA HIDEJI , NAGAI KENICHIRO , TAKEDA KATSUMI
IPC分类号： F24F13/08 , F04D29/66 , F24F1/00
摘要： PROBLEM TO BE SOLVED: To provide a silent noise suppression type rotary nose by removing a cause of interference noise by thinning a hole diameter of an exhaust nozzle formed in a nose body without greatly changing the shape or structure of the nose or the like.
SOLUTION: The exhaust nozzle 2 formed in a nose body 4 is fractionated so that the hole diameter becomes 1/2 or less of the front thickness of an interfering body such as a downstream moving blade without changing the exhaust amount of the total air. The structure of exhaust eddy blown out of the exhaust nozzle 2 into ambient fluid is made fine, and the size of the eddy is made small. Aerodynamic interference of the exhaust eddy with the interfering body is weakened, the diffusion of the exhaust eddy in the air flow is accelerated, turbulence of main flow air distribution is suppressed, and interference between the exhaust eddies or generation of cavity noise in the exhaust nozzle is suppressed. Interfering noise level is controlled without changing the outer shape of the nose or the increasing the number of components.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了通过减少形成在鼻体中的排气喷嘴的孔径来消除干扰噪声的原因来提供无噪声抑制型旋转鼻，而不会大大改变鼻子的形状或结构喜欢。解决方案：形成在鼻体4中的排气喷嘴2被分馏，使得孔直径成为下游动叶片等干扰体的正面厚度的1/2以下，而不改变总计的排气量空气。将从排气喷嘴2吹出的排气涡流的结构变成环境流体，使涡流的尺寸变小。排气涡流与干扰体的空气动力学干扰减弱，排气涡流在气流中的扩散加速，主流量空气分布的紊流受到抑制，排气涡流之间的干扰或排气喷嘴中的腔噪声的产生被压制在不改变鼻子的外形或增加部件数量的情况下控制干扰噪声水平。版权所有（C）2004，JPO

2. 发明专利

JP2003058168A Fluid stirrer, and disturbance and noise reduction system for fluid flow using the same 有权
标题翻译：流体湍流器，以及使用其的流体流动的扰动和噪声减少系统
公开(公告)号：JP2003058168A
公开(公告)日：2003-02-28
申请号：JP2001247593
申请日：2001-08-17
申请人： National Aerospace Laboratory Of Japan , 独立行政法人航空宇宙技術研究所
发明人： NAKATANI TERUOMI , SAKAI KENJI , ISHII TATSUYA , TAKEDA KATSUMI , NAGAI KENICHIRO , OINUMA HIDEJI , BABA SHIGEO
IPC分类号： G01M9/04 , G10K11/16
摘要： PROBLEM TO BE SOLVED: To provide a disturbance and noise reduction system for a fluid flow that reduces the disturbance and noise by temporarily modulating noise and low-frequency-range components of an air current of wind tunnel test facilities, air-conditioning facilities, etc., into high-frequency components which are easy to attenuate.
SOLUTION: A fluid stirrer 10 provided in a wind channel is constituted by stacking fluid stirring layers 22, 23, and 22 formed by putting fine stirring elements, rotating (twisting) a fluid flow in the wind channel by fine flows, together in a honeycomb shape. A drift and a ripple as low-frequency components with long variation cycles included in a uniform flow are modulated into microvortexes of a high-frequency range which easily attenuate when passing through the fluid stirrer 10. Noise of high frequency is further attenuated by a sound absorber 33 as a noise reducing means arranged on the downstream side of the fluid stirrer 10. A straightening mechanism 34 composed of a honeycomb and a net for straightening can be provided on the downstream side of the sound absorber 33.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种用于流体流动的扰动和降噪系统，其通过临时调制风洞试验设备，空调设备等的气流的噪声和低频范围分量来减小干扰和噪声成为容易衰减的高频分量。解决方案：设置在风道中的流体搅拌器10通过堆积流体搅拌层22,23和22而构成，该流体搅拌层22,23和22通过微细搅拌元件形成，通过细流将旋流（扭转）风道中的流体流，形状。漂移和波纹作为包含在均匀流中的具有长变化周期的低频分量被调制到高频范围的微涡旋中，当通过流体搅拌器10时容易衰减。高频噪声被声音进一步衰减吸收器33作为设置在流体搅拌器10的下游侧的降噪装置。在吸声器33的下游侧可以设置由蜂窝和整流用网构成的矫直机构34。

3. 发明专利

JP2003015656A Fine jet control type sound absorption system 有权
标题翻译：精细喷射控制型吸声系统
公开(公告)号：JP2003015656A
公开(公告)日：2003-01-17
申请号：JP2001202953
申请日：2001-07-04
申请人： National Aerospace Laboratory Of Japan , 独立行政法人航空宇宙技術研究所
发明人： ISHII TATSUYA
IPC分类号： G10K11/172 , B64C1/40 , B64D29/00 , G10K11/16 , G10K11/178
CPC分类号： B64D29/00 , B64D2033/0206 , G10K11/178 , G10K2210/109 , G10K2210/121 , G10K2210/1281 , G10K2210/32121
摘要： PROBLEM TO BE SOLVED: To provide a noise suppressing technique which is capable of drastically reducing an installation volume as compared with a sound absorption lining and suppressing the growth of an in-space acoustic mode in spite of the absence of an adapting mechanism by optimization of the shapes of small holes even under the high sound pressure and high-temp environment in combustion equipments, etc.
SOLUTION: This system selects any one among the shapes of the small holes, jet blowout or inflow angles, jet flow rates, the thickness of a partition rear layer and the angles of the airstreams flowing into the partition rear layer or the combinations thereof. The system is installed with error sensors in noise spaces in order to enhance the sound absorbing effect and has the adapting control mechanism for adjusting any one among the shapes of the small holes, the jet blowout or inflow angles, the jet flow rates, the thickness of the partition rear layer and the angles of the airstreams flowing into the partition rear layer or the combinations thereof.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种噪声抑制技术，其能够与吸声衬垫相比能够大大降低安装量，并且通过优化不使用适应机构来抑制空间内声学模式的生长燃烧设备等高声压高温环境下小孔的形状等。解决方案：该系统选用小孔形状，喷射吹流或流入角度，喷射流量，喷射流量，分隔后层和流入分隔后层的气流的角度或其组合。该系统安装了噪声空间中的误差传感器，以增强吸声效果，并具有调整小孔形状，射流喷流或流入角度，射流流量，厚度以及分流后层中的气流的角度或其组合。

4. 发明专利

JP2004144579A Sound source survey method and device 有权
公开(公告)号：JP2004144579A
公开(公告)日：2004-05-20
申请号：JP2002308880
申请日：2002-10-23
申请人： National Aerospace Laboratory Of Japan , 独立行政法人航空宇宙技術研究所
发明人： ISHII TATSUYA , NAGAI KENICHIRO , OINUMA HIDEJI , TAKEDA KATSUMI , NAKATANI TERUOMI
IPC分类号： G01H3/12
摘要： PROBLEM TO BE SOLVED: To provide a sound source survey method and a device capable of accurately surveying a true sound source distinctively from a false sound source by determining efficiently the optimum arrangement of a plurality of sound pressure detection elements for detecting the sound pressure propagated from the sound source.
SOLUTION: The sound pressure of a sound propagated from the sound source 12 existing in a space is detected by a plurality of sound pressure detection elements 3 arranged dispersedly on the surface 2 of a two-dimensional plane or a three-dimensional curved face, and a sound source sound pressure distribution 14 of a virtual sound source estimated relative to the sound source 12 is determined based on a sound pressure signal detected by each sound pressure detection elements 3, and the optimum arrangement of the sound pressure detection elements 3 on the surface 2 is determined from the sound source sound pressure distribution based on a performance function comprising a function between a sound pressure difference ξ between the true sound source 12 and the false sound source 13 and a sound pressure gradient ϕ at the true sound source 12. Genetic algorithm wherein the performance function is used as fitness of selection can be utilized for determination of the optimum arrangement.
COPYRIGHT: (C)2004,JPO

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