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Mahesh V Kulkarni

Bio: Mahesh V Kulkarni is an academic researcher from Maharashtra Institute of Technology. The author has contributed to research in topics: Muffler & Transmission loss. The author has an hindex of 1, co-authored 2 publications receiving 1 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper , the effect of different lengths of Extended Outlet (EO) and Extended Inlet (EI) elements in both chambers of Double Expansion Chamber (DEC) reactive muffler with an external connecting tube on transmission loss was investigated.
Abstract: Internal combustion engines are one of the major causes of noise emissions. As in different industrial equipment, locomotives, and vehicles, the engines have a wide application base. Exhaust noise and noise that is created due to friction of different parts share the extreme input to noise pollution. A muffler is a means used by the exhaust system to reduce noise. For the reduction of noise, it is placed alongside the exhaust pipe. The decrease in the exhaust noise level is controlled by muffler construction and operating techniques. Therefore, the muffler configuration plays an important role. In this research work, an effort has been made to study the effect of parameters like different lengths of Extended Outlet (EO) for constant lengths of Extended Inlet (EI) elements in both chambers of Double Expansion Chamber (DEC) reactive muffler with an external connecting tube on transmission loss. It is observed that, as the length of EO is increased from L/5 to L/3 keeping EI constant, the average transmission Loss for the models decreases. The acoustic performance of the muffler is assessed by using COMSOL Multi-Physics and experimental validation.

2 citations

Journal ArticleDOI
TL;DR: The major source responsible for noise pollution is internal combustion engine as discussed by the authors, these engines are used for various purposes such as in automobiles, locomotives, and in various manufacturing machine.
Abstract: The major source responsible for noise pollution is internal combustion engine These engines are used for various purposes such as in automobiles, locomotives, and in various manufacturing machine

1 citations

Book ChapterDOI
TL;DR: In this paper , a mathematical model based on the Buckingham theorem was developed to study and optimize the solar water storage tank during the charging processes, and two optimum points were set during charging.
Abstract: Buckingham's theory uses quantitative analysis to include the basic concepts of mathematical modeling by reducing the number of parameters in equations, making it simpler for quality studies. In this work, the novel mathematical modeling has been developed to study and optimize the solar water storage tank during the charging processes. Experiments were conducted in a tank to store hot water under natural conditions on various days in Jalgaon Maharashtra, India to test the performance of the system. These experimental data were used to prepare mathematical modeling based on the Buckingham theorem by subject to dependant variable (TL) and independent variables (V, gβΔt, Cp, ρ, U, Qs). The progression of the Mathematics model was compared with that of ANN. Operating parameters, i.e., loading temperature; thermal stratification, as well as thermal insulation have been used in the model of ANN. The statistical modeling and ANN results obtained are verified with test data. Studies show that high deviations of 2.7° C and 1.76° C were found, respectively. The operation of the hot water storage tank during the charging process is best performed by linear programming problem (LPP). The result of the Mathematics model shows two correct solutions for the hot water storage tank during the charging process. As a result, two optimum points are set during charging.
Journal ArticleDOI
TL;DR: In this article , the effect of change in the diameter of a reactive muffler with extended inlet on transmission loss was analyzed using finite element analysis with COMSOL multiphysics using 3D model of muffler and computer aided engineering.
Abstract: Objectives: Muffler with extended inlet has an additional dimension of variable compared to normal mufflers, that is the diameter. Understanding the effect of change in this diameter value affects Transmission Loss. Muffler used for experimentation is a reactive muffler, which cancels the noise waves using reflection phenomenon. Comparison of Computer Aided Engineering (CAE) in experiments to signify the technology advancement. Methods: MATLAB program is created for running the data and analytical solution. Finite element analysis with COMSOL Multiphysics using 3D model of muffler and computer aided engineering is done considering boundary conditions. The real experiment is carried out to evaluate confidence in simulated results where two load method is applied. Findings: Experimental setup results are showing results close to Numerical analysis. Analysis of the study suggest increase in diameter leads to rise in transmission loss. The experimental results of selected dimensions setup also prove same. Various geometric variation in muffler have effect of 10 to 30% on TL, while changing diameter from 10 to 20 mm of extended inlet raise the peak of TL to almost double and increase the average TL by 28%. Novelty: A diameter variation in extended inlet is an empty space in literature till now. This research combines analytical and experimental setups and comparison of results leads to a strong conclusion toward better muffler design. Keywords: Transmission Loss (TL); Single Expansion Chamber reactive muffler; Numerical analysis; Twoload method; Acoustics
Proceedings ArticleDOI
24 Jan 2023
TL;DR: In this article , an efficient adaptive CVT cooling system is proposed to lower the amount of heat dissipated in the CVT components during high speeds, when the driver and driven shafts slip, and when used for an extended period of time.
Abstract: A Continuously Variable Transmission (CVT) is a automated gearbox that allows the driver and driven shafts to have unlimited gear ratios. In addition to other vehicles, they can be found in scooters, Baja cars, and snowmobiles. From the driving side to the driven side, an engine belt and pulleys transfer engine power (secondary). Infinite gear ratios can be produced by adjusting the belt’s diameter over the pulleys. At higher speeds, when the clutch slips, and when the CVT is utilized for an extended period, more heat is produced in the CVT components., it decreases component service life while also reducing performance. As a result, CVT cooling is required. The adaptive cooling system can help to lower the amount of heat that is dissipated. The work includes making an efficient adaptive CVT cooling system.

Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors studied the problem of a muffler with internal extended inlet/outlet tubes with the aim to optimize its geometric design, and proposed an isogeometric BM (IGA-BM) model to solve the muffler problem as an interior 3D Helmholtz acoustic problem.

16 citations

Journal ArticleDOI
10 Dec 2019
TL;DR: In this article, a 2mm diameter equal circular perforations were introduced in the resonator chamber to verify the effect on the transmission loss characteristics, and the average transmission loss performance of the designed mufflers were 48.62, 47.77, 39.01, and 37.77dB for the perforation, inlet pipe diameter increase, outlet pipe diameter, and standard muffler respectively.
Abstract: Confronted with noise disturbance during transmission of vehicle exhaust air, several mufflers have been designed to control the noise and improve the transmission characteristics. In order to optimize the noise control and attenuation quality, the internal geometry, inlet and outlet pipe diameters of a designed muffler were varied and the performance evaluated using finite element method (FEM). Furthermore, 2mm diameter equal circular perforations were introduced in the resonator chamber to verify the effect on the transmission loss characteristics. The results show that the performance of the muffler with inlet pipe diameter variation is significantly better (68dB) than the standard muffler (55dB) in controlling and reducing acoustic wave propagation within the same frequency range of (200~580Hz). The performance improved further to 70 dB by the introduction of circular perforations in resonator chamber. However, with the variation in the outlet diameter increase the performance of the muffler was 55dB but within a higher frequency range of 220~680Hz which is not reliable for acoustic wave propagation control. The average transmission loss performance of the designed mufflers were 48.62, 47.77, 39.01 and 37.77dB for the resonator chamber perforation, inlet pipe diameter increase, outlet pipe diameter increase and standard muffler respectively. Therefore, the designed muffler with resonator chamber perforations is the best for optimal acoustic wave control.

6 citations

Journal ArticleDOI
TL;DR: In this paper , the authors present a novel, organized design process of that muffler for the KTM390 engine as a case study, which leads to an increase in the efficiency of designing mufflers (for example, 41.2% improvement on backpressure).
Abstract: Engine noise, as a source of sound pollution for humans and the environment, can be reduced by designing a high-performance muffler. This study presents a novel, organized design process of that muffler for the KTM390 engine as a case study. The acoustic simulation analysis is performed in COMSOL software and aerodynamic analysis is performed in ANSYS Fluent. The features of the muffler considered in this designing process are the overall length of the muffler, the presence of baffles and related parameters (baffle distance, baffle hole diameter, and baffle hole offset), and the effects of extended tubes. In order to evaluate the acoustic performance of the muffler, an objective function has been defined and measured on two frequency ranges, 75–300 Hz and 300–1500 Hz. For evaluating the aerodynamic performance of that, the amount of backpressure is analyzed to achieve a maximum of 3.3 kilopascals for this muffler. The selection of the appropriate parameters includes comparing the resulting transmission loss curves and quantitative evaluation of objective functions (for transmission loss) and backpressure. This organized design process (i.e., tree diagram) leads to an increase in the efficiency of designing mufflers (for example, 41.2% improvement on backpressure).