Analysis of Performance of Automotive Exhaust Muffler Based on ANSYS Finite Element

2014 ◽  
Vol 509 ◽  
pp. 118-122 ◽  
Author(s):  
Jian Hui Ma ◽  
Peng Guo
Keyword(s):  
Power Loss ◽  
Simulation Analysis ◽  
Low Cost ◽  
Engine Exhaust ◽  
Experiment Method ◽  
Exhaust Noise ◽  
And Performance ◽  
Analysis Of Performance ◽  
Performance Research ◽  
Engine Power

At present, the control of the automobile engine exhaust noise is mainly installed exhaust muffler. Muffler design and performance research mainly around the silencing performance and the influence to engine power loss. This article built the 3d modeling of automobile exhaust muffler and through simulation analysis obtained the muffler internal acoustic pressure distribution and changes of insertion loss with frequency. Predict the silencer muffler performance as well as the influence on engine power loss. Provide a reference basis for the design of the silencer and optimization. Compared to the traditional experiment method, the method in this article has the advantages of short cycle, low cost.

scholarly journals Organic Fluid Turbines for Various Engine Power Level Turbochargers

1988 ◽  
Author(s):  
Giovanni Cerri
Keyword(s):  
Power Level ◽  
Thermal Power ◽  
Rankine Cycle ◽  
Engine Exhaust ◽  
Design Problems ◽  
Design Concepts ◽  
And Performance ◽  
Low Degrees ◽  
Turbine Design ◽  
Engine Power

Engine exhaust thermal power can be recovered with bottoming Rankine cycle turbine used to drive the engine charging compressor. This paper describes the turbine design concepts and performance analysis of organic fluid turbines for various size turbochargers to be employed with diesel engines of different power levels. Such designs result in monostage full admission turbines with supersonic exit stator nozzles and low degrees of reaction. Turbine expansion efficiencies from 77% to 79% and overall organic fluid turbocharger efficiencies from 53% to 63% are projected with engine power levels ranging from 100 kW to 20 MW. Design problems such as sealing are discussed.

Experimental Analysis and CAE Optimization for Exhaust Noise of the Diesel

2011 ◽  
Vol 105-107 ◽  
pp. 366-369 ◽  
Author(s):  
Yuan Yuan Zhang ◽  
Shun Ming Li ◽  
Yi Xian Hu ◽  
Guo You Hu ◽  
Wen Feng Lu ◽  
...  
Keyword(s):  
Finite Element ◽  
Diesel Engine ◽  
Insertion Loss ◽  
Experimental Analysis ◽  
Power Loss ◽  
Transmission Loss ◽  
Simulation Analysis ◽  
Exhaust Noise ◽  
Cae Simulation ◽  
Better Than

Based on compute analysis engineering (CAE), the performances of acoustic and fluent for muffler comprehensively were analyzed and optimized in the paper. First, aiming at the heavy exhaust noise of diesel engine, bench experiments of measuring independently were designed and carried out, the frequency spectrum of exhaust noise was achieved, combining with simulation analysis of the finite element, acoustic and fluid performances of the original muffler and respective muffling cavities were analyzed, whose shortage such as transmission loss, pressure loss and flow regeneration noise were achieved, the muffler would be re-designed by CAE. Simulation shows the performances of improved mufflers were better than the original one. Eventually, insertion loss of experiment for new muffler is more 10dB(A) above than the original one, and power loss met requirement.

scholarly journals Design and Flow Analysis of Radial and Mixed Flow Turbine Volutes

2008 ◽  
Author(s):  
Mohammed Hamel ◽  
Mohamed K. Hamidou ◽  
Hichem T. Cherif ◽  
Miloud Abidat ◽  
Sid Ali Litim
Keyword(s):  
Low Cost ◽  
Flow Analysis ◽  
Turbulence Models ◽  
Mixed Flow ◽  
Engine Exhaust ◽  
Flow Angle ◽  
Ansys Cfx ◽  
And Performance ◽  
The One ◽  
Volume Method

Radial and mixed flow turbines which are an important component of a turbocharger consist essentially of a volute, a rotor and a diffuser. Vaneless volute turbines, which have reasonable performance and low cost, are the most widely used in turbochargers for automotive engines. Care has to be done in the design of the volute, whose function is to convert a part of the engine exhaust gas energy into kinetic energy and direct the flow towards the rotor inlet at an appropriate flow angle with reduced losses. Turbulent compressible flow analysis and performance prediction using the finite volume method with two turbulence models (RNG k-ε and SST) implemented in the ANSYS-CFX software, are carried out on two different volute types. Four volutes, with different cross section areas used for radial turbines, are studied and the computed results are compared with the available experimental data. The second volute studied is the one used for a mixed flow turbine in the turbocharger test rig at Imperial College. In this part of the study, the interest is focused on the influence of the volute inlet flow conditions on its performance (efficiency, exit flow angle, etc).

Computer simulation study about the dependence of amorphous silicon photonic waveguides efficiency on the material quality

2020 ◽  
Vol 90 (3) ◽  
pp. 30502
Author(s):  
Alessandro Fantoni ◽  
João Costa ◽  
Paulo Lourenço ◽  
Manuela Vieira
Keyword(s):  
Amorphous Silicon ◽  
High Throughput Screening ◽  
Simulation Analysis ◽  
Low Cost ◽  
Deposition Process ◽  
Large Area ◽  
Sidewall Roughness ◽  
Sensing Applications ◽  
Fabrication Defects ◽  
The Impact

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.

Human Morphometrics, Motion, and Performance Research.

1994 ◽  
Author(s):  
Bruce Bradtmiller ◽  
Sherri Upchurch-Blackwell ◽  
Henry W. Case ◽  
Thomas D. Churchhill ◽  
Daniel N. Mountjoy
Keyword(s):  
And Performance ◽  
Performance Research
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