서지주요정보
최적화된 집적 유한 차분법을 이용한 항공기 팬 소음의 근거리 방사 연구 = A numerical study on the sound radiation from aircraft engine inlet using optimized compact scheme
서명 / 저자 최적화된 집적 유한 차분법을 이용한 항공기 팬 소음의 근거리 방사 연구 = A numerical study on the sound radiation from aircraft engine inlet using optimized compact scheme / 심인보.
발행사항 [대전 : 한국과학기술원, 1998].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8008659

소장위치/청구기호

학술문화관(문화관) 보존서고

MAE 98012

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

Recently, the aircraft noise becomes more important due to military and commercial demands. And the majority of the aircraft noise is generated by the fan and compressor, because the most of the modern aircraft have high bypass ratio engines. Therefore, to predict aircraft interior/exterior noise precisely, it is necessary to calculate fan and compressor noise. In engine inlet, a acoustic field is strongly coupled with a flow field. So, if the Mach number arrives to some degree, we cannot use linear wave equation anymore, due to nonlinear effect. Therefore, in this thesis, a nonlinear Euler equation is used in order to calculate the acoustic field and the flow field in the inlet at the same time. Because the acoustic property has much smaller amplitude compared with the flow field, we must use high resolution scheme. In this thesis, optimized compact scheme, that is one of new CAA(computational aeroacoustics) techniques, is applied to the general problem of aircraft engine inlet. And, conformal mapping is used for the grid generation, which makes the grid with good orthogonality and metric distribution. To validate the developed code, the acoustic fields driven by baffle and monopole source are computed and compared with exact solutions. Finally, the fan modelling of Tyler & Sofrin is applied to the real JT15D engine, and the propagation patterns of each mode are presented.

서지기타정보

서지기타정보
청구기호 {MAE 98012
형태사항 vii, 56 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : In-Bo Shim
지도교수의 한글표기 : 이덕주
지도교수의 영문표기 : Duck-Joo Lee
학위논문 학위논문(석사) - 한국과학기술원 : 항공우주공학과,
서지주기 참고문헌 : p. 35-36
주제 최적화된 집적 유한 차분법
엔진 입구
등각 사상
오일러 방정식
팬 소음
Optimized compact scheme
Engine inlet
Conformal mapping
Euler equation
Fan noise
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