Российский фонд
фундаментальных
исследований

Физический факультет
МГУ им. М.В.Ломоносова
 

H

Hao Yan

 

Xingqiang Liu, Wenchao Huang, Hao Yan, Hongli Li «Tandem cylinder noise characteristics research and advance noise reduction method exploration» Тезисы докладов Шестой открытой Всероссийской (XVIII научно-технической) конференции по аэроакустике (22–27 сентября 2019 г.), с. 203-206 (2019)

With the reduction of jet noise associated with high pass ration engines on large civil transport aircraft. The airframe noise has become a primary noise source during takeoff and landing. A major component of airframe noise is the deployed landing gear. The configuration of landing is very complex; noise originates from the flow separation due to complex buff bodies and the wake flow multiple interactions with downstream components. Tandem cylinder represents generic flow geometry relevant to landing gear. The major interest is the nature of interaction of unsteady wake from upstream cylinder with the downstream cylinder. Wake interactions are expected to have a big impact on the noise generation. Experiment has been performed in this paper to access the noise characteristics, basing on the mechanism of noise generation, some advance control methods, such as plasma and turbulence, were used to reduce the noise.

Тезисы докладов Шестой открытой Всероссийской (XVIII научно-технической) конференции по аэроакустике (22–27 сентября 2019 г.), с. 203-206 (2019) | Рубрика: 04.11

Hedberg C.M.

 

Gurbatov S.N., Rudenko O.V., Hedberg C.M. Nonlinear Acoustics through Problems and Examples (2010). 184 с.

The fundamentals of nonlinear acoustics are presented in form of problems followed by solutions, explanations and answers. As distinct from existing textbooks, this book of problems not only helps the reader to become familiar with nonlinear wave processes and the methods of their description, but contributes to mastering calculation procedures and obtaining numerical estimates of the most significant parameters. Thereby, skills are acquired which are indispensable for carrying out original scientific research. This book can be useful to undergraduate and postgraduate students and researchers working in the field of nonlinear wave physics and acoustics. Перевод учебного пособия на ангийский язык, дополненный новым материалом. Пособие основано на курсах лекций, прочитанных в России (МГУ, ННГУ), а также в ряде университетов США, Японии, Швеции. Содержит как задачи, так и решения к ним. Книга автономна. Она позволяет изучить физику интенсивных акустических волн, не обращаясь к другим учебным пособиям и монографиям. Решения и задачи посвящены не только классическим проблемам нелинейной акустики, но и к современным, развивающимся направлениям.

Nonlinear Acoustics through Problems and Examples (2010). 184 с. | Рубрики: 02 05

Hongli Li

 

Xingqiang Liu, Wenchao Huang, Hao Yan, Hongli Li «Tandem cylinder noise characteristics research and advance noise reduction method exploration» Тезисы докладов Шестой открытой Всероссийской (XVIII научно-технической) конференции по аэроакустике (22–27 сентября 2019 г.), с. 203-206 (2019)

With the reduction of jet noise associated with high pass ration engines on large civil transport aircraft. The airframe noise has become a primary noise source during takeoff and landing. A major component of airframe noise is the deployed landing gear. The configuration of landing is very complex; noise originates from the flow separation due to complex buff bodies and the wake flow multiple interactions with downstream components. Tandem cylinder represents generic flow geometry relevant to landing gear. The major interest is the nature of interaction of unsteady wake from upstream cylinder with the downstream cylinder. Wake interactions are expected to have a big impact on the noise generation. Experiment has been performed in this paper to access the noise characteristics, basing on the mechanism of noise generation, some advance control methods, such as plasma and turbulence, were used to reduce the noise.

Тезисы докладов Шестой открытой Всероссийской (XVIII научно-технической) конференции по аэроакустике (22–27 сентября 2019 г.), с. 203-206 (2019) | Рубрика: 04.11

Hou Feng

 

Huang Wenchao, Pan Kai, Hou Feng «Discussion about acceptable levies of aircraft cabin noise and its control technology» Тезисы докладов Шестой открытой Всероссийской (XVIII научно-технической) конференции по аэроакустике (22–27 сентября 2019 г.), с. 245-246 (2019)

The noise level in civil aircraft cabin is a comprehensive reflection of the aircraft design technical level. While the noise level in the cabin could directly reflect the comfort of passengers, it could indirectly affect the market competitiveness of the aircraft. The sound pressure level at the passenger's ear position during cabin flight is usually employed to evaluate the aircraft cabin noise level. With the advancement of aviation technology, not only the А-weighted noise level and the speech interference level, but also other physical quantities with considering human perceptions could be used as evaluation references. The basis for the noise level in the aircraft cabin, on the other hand, due to the imbalance of technological development, could also vary largely in terms of technical indicators. For example, a difference of 10 dB(A) in the design index of cabin noise could happen in the same generation of civil aircrafts, which might bring a large design risk. The paper emphasizes that the employment of appropriate aircraft cabin noise design standards, the development of appropriate design objectives, and the use of effective cabin noise control techniques or acoustic design methods are prerequisites for a successful design of civil aircraft. Since the China-Russia jointly developed civil aircraft CR929 is positioned as the main model to compete in the international aviation market, the indicators of its cabin acoustic design could be very important for the final performance and survival of the aircraft. How to formulate noise indicators more scientifically and adopt more effective noise control methods are the key issues facing by Chinese and Russian aviation engineers in terms of the development of CR929. The following main topics will be addressed: the importance of aircraft low cabin noise; design objectives and evaluation method of aircraft cabin noise; main factors affecting aircraft cabin noise; key technology for aircraft cabin noise control; opportunities and challenges of CR929 aircraft cabin acoustic design

Тезисы докладов Шестой открытой Всероссийской (XVIII научно-технической) конференции по аэроакустике (22–27 сентября 2019 г.), с. 245-246 (2019) | Рубрики: 08.14 11.03

Huang Wenchao

 

Huang Wenchao, Pan Kai, Hou Feng «Discussion about acceptable levies of aircraft cabin noise and its control technology» Тезисы докладов Шестой открытой Всероссийской (XVIII научно-технической) конференции по аэроакустике (22–27 сентября 2019 г.), с. 245-246 (2019)

The noise level in civil aircraft cabin is a comprehensive reflection of the aircraft design technical level. While the noise level in the cabin could directly reflect the comfort of passengers, it could indirectly affect the market competitiveness of the aircraft. The sound pressure level at the passenger's ear position during cabin flight is usually employed to evaluate the aircraft cabin noise level. With the advancement of aviation technology, not only the А-weighted noise level and the speech interference level, but also other physical quantities with considering human perceptions could be used as evaluation references. The basis for the noise level in the aircraft cabin, on the other hand, due to the imbalance of technological development, could also vary largely in terms of technical indicators. For example, a difference of 10 dB(A) in the design index of cabin noise could happen in the same generation of civil aircrafts, which might bring a large design risk. The paper emphasizes that the employment of appropriate aircraft cabin noise design standards, the development of appropriate design objectives, and the use of effective cabin noise control techniques or acoustic design methods are prerequisites for a successful design of civil aircraft. Since the China-Russia jointly developed civil aircraft CR929 is positioned as the main model to compete in the international aviation market, the indicators of its cabin acoustic design could be very important for the final performance and survival of the aircraft. How to formulate noise indicators more scientifically and adopt more effective noise control methods are the key issues facing by Chinese and Russian aviation engineers in terms of the development of CR929. The following main topics will be addressed: the importance of aircraft low cabin noise; design objectives and evaluation method of aircraft cabin noise; main factors affecting aircraft cabin noise; key technology for aircraft cabin noise control; opportunities and challenges of CR929 aircraft cabin acoustic design

Тезисы докладов Шестой открытой Всероссийской (XVIII научно-технической) конференции по аэроакустике (22–27 сентября 2019 г.), с. 245-246 (2019) | Рубрики: 08.14 11.03