检索结果-南通市图书馆

Passive Control of an impulsive wave Using a Cavity/Helical Vane System

Journal of Thermal Science 1999年第1期8卷 1-8页

作者： ToshiakiSetoguchi Heuy－DongKim 等 DepartmentofMechanicalEngineering SagaUniversity1Honjo－machiSaga－shisaga840－8502Japan SchoolofMec

In many engineering practices, frequently an impulsive wave is a consequence of discharge of a shockwave from the exit of a tube, leading to an annoying noise like a sonic boom. The impulsive noisehas often been a major factor to limit the performance of flow devices as well as to affect hazardousinfluences on human being. The current paper describes a new control method for the reduction ofimpulsive wave. An experiment using a simple shock tube was carried out to examine the effect of acavity/helical vane system on the impulsive wave strength. The resulting impulsive wave was influencedby the detailed configuration of the belieal vane inside the cavity which is located at the vicinity ofthe exit of a tube. The effect of the belieal vane was compared with no belieal vane tests to ensurevalidation of this kind of control strategy. The results showed that the strength of the impulsive wavecould be significantly reduced by the current passive control using the cavity/helical vane system.

关键词： unsteady flow compressible internal flow impulsive wave shock wave passive control shock wave discharge.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Characteristics of Spherical Shock wave and Circular Pulse Jet Generated by Discharge of Propagating Shock wave at Open End of Tube

引用

Journal of Thermal Science 2003年第3期12卷 245-249页

作者： Tsukasa Irie Tsuyoshi Yasunobu Hideo Kashimura Toshiaki Setoguchi Kazuyasu Matsuo Department of Mechanical Engineering Kitakyushu National College of Technology ShiiKokuraminami-ku Kitakyushu 802-0985 Japan Department of Control and Information Systems Engineering Kitakyushu National College of Technology Shii Kokuraminami-ku Kitakyushu 802-0985 Japan Department of Mechanical Engineering Saga University Honjo Saga 840-8502 Japan Department of Mechanical Systems and Environmental Engineering Univ. of Kitakyushu1-1 Hibikino Wakamatsu-ku Kitakyushu808-0135 Japan

When the shock wave propagating in the straight circular tube reaches at the open end, the impulsive wave is generated by the emission of a shock wave from an open end, and unsteady pulse jet is formed near the open end behind the impulsive wave under the specific condition. The pulse jet transits to spherical shock wave with the increase in the strength of shock wave. The strength is dependent on the Mach number of shock wave, which attenuates by propagation distance from the open end. In this study, the mechanism of generating the unsteady pulse jet, the characteristics of the pressure distribution in the flow field and the emission of shock wave from straight circular tube which has the infinite flange at open end are analyzed numerically by the TVD method. Strength of spherical shock wave, relation of shock wave Mach number,distance decay of spherical shock wave and directional characteristics are clarified.

关键词： shock wave impulsive wave numerical analysis spherical shock wave TVD method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Discharge of a Shock wave from an Open End of a Tube

引用

Journal of Thermal Science 2000年第1期9卷 30-36页

作者： Hideo Kashimura Tsuyoshi Yasunobu Hiroyasu Nakayama Toshiaki Setogucki Kazuyasu Matsuo Department of Control and Information Systems Engineering Kitakyushu National College of Technology5-20-1ShiiKokuraminami-kuKiatakyushu-shiFukuoka 802-0985 Japan

When a Pressure wave propagates along a constant area straight tube and reaches at the open end, an impulsive wave is emitted outward from the tube exit toward the surrounding area and causes an impulsive noise like a sonic boom. In order to clarify the magnitude of an impulsive wave obtained by the discharge of a weak shock wave born an open end of a tube in relation to the noise problem and the industrial devices, the experimental and numerical investigations have been carried out for various strength of a shock wave. A simple open end shock tube with the flange at the tube *** used and the numerical calculation using the TVD scheme was performed. The effective equations which concerns with the magnitude of an impulsive wave generated by the emission of a shock wave have been obtained from the procedure of the open end correction based on the aeroacoustic theory and the numerical results. The influence of open end correction length and the diameter of a flange on the magnitude of an impulsive wave has been discussed.

关键词： compressible flow unsteady flow shock wave impulsive wave aeroacoustic theory.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：