초록

○ 본 사업의 수행을 통해 다음과 같은 연구결과를 확보 할 수 있었음
- 격자 구조의 크기, 길이 변화에 따른 감음성능 파라미터 확보
- 확대 구조 추가를 통한 저주파 감음 성능 확보
- 선박용 Silener의 시험 방법 검토/확보
- 저주파 대역의 감음성능 확보, 고주파 대역 감음 성능 확보
- 저 차압 구조 Silencer 형상 구조 확보
- 수요기업 초청 시험을 통한 판매 활로 확보
- 공인 시험 수행을 통한 개발 제품 성능 검증

Abstract ▼

Chapter 1. Summary of research and development projects
Section 1. An overview of the product development
Through this research to develop "Silencer" Silencer Unlike other consideration for the flow of fluid is needed. Engine performance degradation due to the differential pressure generated b

Chapter 1. Summary of research and development projects
Section 1. An overview of the product development
Through this research to develop "Silencer" Silencer Unlike other consideration for the flow of fluid is needed. Engine performance degradation due to the differential pressure generated by the silencer due to the impact. In addition, there are many restrictions on the mounting position. Accordingly the design developed in this study have a limited size of the silencer through the noise reduction does not change issues.
Section 2. Justification
Silencer is produced in the country in the high-frequency noise reduction technology for secured reduction technology, but the lack of low frequency noise. As a result, Samsung Heavy Industries, Hyundai Heavy Industries, Daewoo Shipbuilding & Marine Engineering and other companies in the demand for low-frequency noise reduction technology needs to be. However, the findings are far insufficient. Using a perforated structure particularly SHI technical development being carried out but the temperature of the gas inlet, the flow rate needs to be designed according to the problem.
Plan to develop products in this challenge, regardless of the incoming fluid is applied to the product. This is the main cause of noise through the development of techniques to control the turbulent low frequency noise due to the occurrence of blocking. The technique is developed in the engine of any Type Station will be able to apply.
Section 3. The range of research and development
Through research Plan to develop the technology the existing silencer is by changing the internal shape of silencer 1. Developing the geometry of the turbulence in the fluid commutation, 2. Foreclosure mitigation shape development, 3. Improve the winding performance of the high frequency band.
Chapter 2. Status of technology development at home and abroad
Section 1. Domestic Technology Trends
Domestic manufacturers of marine silencer, unlike other small-scale industries to. Accordingly demand for companies to produce drawings provided situation. In this environment, depending on the progress of technology development for silencer was impossible. These companies NRTech, Jib Tech, showcasing some of the technology industry are under development, but for low-frequency, high-frequency performance, the decay in the area does not have believed to be developing products.
Section 2. Foreign Technology Trends
The basic research overseas advanced noise reduction technology is believed to be higher than the level of domestic technology. However, most of the noise reduction technology silencer through the acoustic sensors to identify noise sources and generating additional way of sound. This technology is expensive and the price on the environment due to lack of corrosion is difficult to apply to ships and offshore plants.
Especially offshore, marine engines of development of 200 ℃ ~ 300 ℃ high temperature of the exhaust gases to be acoustic sensors to generate a lot of protection, and maintenance costs are expected.
Chapter 3. Details and results of research and development in progress
Section 1. Research and development goals
○ Containing the low-frequency noise reduction "Ship / Plant" silencer development
■ Product Size : 500A
■ Fluid condition : High Tempreture, High pressure, generate engine exhaust gas
■ Reduce noise( ΔdB ) : 20 dB
■ Pressure drop( ΔP ) : 450Pa
Section 2. Do this research
1. Regulatory investigations and test equipment design and testing
The figure above shows the first drawing out design will test equipment. To represent the flow noise silencer rear silencer was fitted to Fan to simulate engine noise is a form of the Speaker to install.
The figure above shows a drawing definitive test equipment will be out. Initial testing design have fluid flowing diffracted by bent pipe. In addition, because of a problem with the position of Speaker, as shown above, was changed.
2. Legislation related to the development of this technology
This study is related to the line noise code legislation (Resolution A.468 (Ⅻ) and the revision of SOLAS Reg. Ⅱ -1/36 during revision that established by.
3. Absorption of materials research / selection
4. Base design for Silencer
5. Performance test by CFD
6. Noise Parameter analysis for Silencer design
7. Flow analysis for low differential geometry
8. Prototype manufacturing / testing
Chapter 3. Details and results of research and development in progress
Chapter 4. Conclusion Research
1. Consumer test method in combination with KS future regulations that can meet the needs of consumer testing method and thus the test management method for the accumulation hayeoteum techniques.
2. The enlarged area shaped like silencer, the grid area, sound-absorbing material placed on the interpretation of the Parameter values varying the shape of each piece of article tend to know there was winding performance.
3. Development through consumer testing prototypes invited to ensure the excellence of industrialization was proceeding thus was very helpful (for sales to 10 Set silencer development, 73 million won).