• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.279-283
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• 2001

We described an integrated management system, which is a design system of suction muffler(SMDS). SMDS constructs a virtual design system and possesses a Mutual Interfacing Module function using a Remote Analysis function and a GUI(Graphic User Interface). This system consists of a sever and clients. Client performs modeling and preprocessing, and server analyzes the results. The system uses Telnet and FTP based on TCP/IP protocol for connecting a client with a server.. It uses a PC at each work place as a basic platform for design and analysis of goods, and si able to manage a project as a unit. It is shown through an exsample that it is useful as a design tool in the fields.

• Proceedings of the KSME Conference
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• 2001.11b
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• pp.337-340
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• 2001

The suction muffler of a reciprocating compressor is used for reducing noise produced by pressure pulsations. According to the shape, the suction muffler is classified into one-chamber type, two-chamber type, Helmholtz resonator type, pipe-resonator type, and so on. These mufflers are used according to the characteristics of the frequency of compressor noise. In this study, four pole parameters have been used for calculating Transmission Loss of the muffler, and Insertion Loss has been acquired for the optimum design of the muffler by the experiment.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2014.10a
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• pp.771-772
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• 2014

In this paper, the integrated design method of suction muffler in compressor was studied. There are three things to consider when designing this. First, the transmission loss was maximized to consider the noise reduction. Second, dissipation energy of fluid flow was minimized for energy efficiency. Finally, acoustical resonance frequency of suction muffler was controlled because energy efficiency can be increased by supercharging of refrigerant. Therefore, suction muffler was designed to have the specific resonance frequency. The input impedance was used for designing target acoustical resonance frequency. Topology optimization was used for optimization method.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2013.04a
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• pp.301-302
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• 2013

• 유체기계공업학회:학술대회논문집
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• 2004.12a
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• pp.517-520
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• 2004

• Journal of the Korean Society for Precision Engineering
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• v.19 no.2
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• pp.220-227
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• 2002

The design of suction muffler for compressor aims to achieve a maximum noise reduction and a minimum pressure loss. Until now, the design process has been performed experimentally rather than theoretically. In this paper, to achieve the maximum noise reduction and minimum pressure loss. we studied the effect of the shape and volume of the expansion tube of the muffler on TL and pressure drop. We made an extensive use of computer program such as SYSNOISE. FLUENT, and STAR-CD to calculate the TL and pressure distribution of suction muffler. The design of the muffler is optimized with respect to flow loss and TL. Experiments are performed to check the result of design change, which proves satisfactory results. It is expected that this process can reduce time to design a muffler in the fields.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.25 no.8
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• pp.532-538
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• 2015

In a reciprocating compressor, highly impulsive pressure fluctuations induced by a reciprocating piston give rise to serious noise and vibration problems. A muffler is frequently used to reduce this impulsive noise, but also has adverse effects on compressor performance due to additional pressure drop and heat transfer of refrigerants through it. Therefore, the flow and acoustic performances of mufflers used in a compressor should be considered simultaneously. In this study, both of flow and acoustic performances of mufflers are investigated using computational fluid dynamic techniques by solving full three-dimensional compressible Reynolds-Averaged Navier-Stokes equations. For validation purpose, the numerical method is initially applied to predict the transmission loss of a simple expansion muffler, and its predicted results show good agreements with theoretical and experimental results. Then, the flow and acoustic performances of an existing muffler is numerically investigated. On the basis of the analysis results, a new muffler is purposed and its performances are compared with the existing one. Improved performances of the new muffler are confirmed.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2001.05a
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• pp.1162-1167
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• 2001

Suction valve fluttering is generated by reciprocating motions of the piston inhaling and discharging process of gas in the hermetic compressor. A reactive type suction muffler, which produces high pressure-drop because of its complicated flow path, controls the impulsive noise radiated from the flutter of suction valve. The high-pressure drop in the muffler increases the transmission loss, but reduces the EER(Energy Efficiency Ratio) of the compressor. We consider how to design the high acoustic attenuation and low pressure-drop performance to take account of the acoustic and flow performances of the suction muffler. In this study, we identified the suction noise source of compressor from the measurement of the acoustic pulsation and flutter of suction valve. We analyzed the acoustic characteristics of muffler using the finite element method, and compared the experimental and analytical characteristics of flow path of suction muffler. Theoretical predictions and experimental results are compared from the viewpoint of the acoustic performance and energy efficiency of the compressor.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2000.06a
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• pp.1429-1436
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• 2000

Suction muffler is one of the important component of a compressor for low noise level and high efficiency. The suction muffler which has the complicated flow path gives the higher transmission loss of sound, but lower efficiency of compressor results from the superheating effect and flow loss in suction flow path. It is shown that the computational analysis of fluid dynamics are very popular methods for designing of high performance and low noise suction muffler. To reduce the thermodynamic and flow loss in suction process, the flow path of suction muffler was estimated by FVM(Finite Volume Method) and verified by experiments. And to enlarge the transmission loss of sound, the acoustic properties inside the suction muffler was analyzed by FEM(Finite Element Method) and experiments. The smart muffler which gives a good efficiency and low noise character was developed by using those methods, and the effect was evaluated in compressor by experiment.