Modeling for combined effect of muffler geometry modification and blended fuel use on exhaust performance of a four stroke engine: A computational fluid dynamics approach

Mishra, Prakash Chandra; Kar, S.; Mishra, Harshit; Gupta, Anand

doi:10.1016/j.applthermaleng.2016.08.009

Cited by 18 publications

(6 citation statements)

References 17 publications

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“…At part-load conditions due to lower temperature attained inside the combustion chamber the NO x formed is also low but increases as the load is increased. 23 The change of burnt gas temperature at varied loading conditions and LPG flow rates are given in Figures 4-7. As the LPG flow rate increases for a given load, the relative proportion of LPG with respect to diesel increases hence combustion becomes closer to premixed combustion mode.…”

Section: Burnt Gas Temperature Variation With Lpg Flow Ratementioning

confidence: 99%

“…Several numerical and analytical approaches have been used by different investigators for the prediction of performance parameters and emissions. 22,23 CFD modeling and simulation techniques have been applied by different researchers in understanding and predicting the engine parameters in conventional diesel and dual-fuel engines. The main drawbacks with such CFD models include higher computational time, inaccurate results due to the various assumptions made, and the implication of various constraints in applying the boundary conditions.…”

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confidence: 99%

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Modeling and prediction of NO_x emission in an LPG–diesel dual‐fuel CI engine

Murthy

Srinivas

2021

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Different alternative fuels have been proposed by various researchers in diesel engines in view of increased NO x and particulate emissions. Out of the various methods proposed, dual fueling is one of the most important techniques that helps solve the different operational problems related to diesel engine combustion and emission. In the current study, modeling and predicting the formation of NO x emission in a duel fuel liquefied petroleum gas (LPG)-diesel engine has been undertaken. Simulations have been conducted for various LPG flow rates at different engine loads and the predicted NO x values are compared with the experimental values. The results found that there is a decent agreement between the forecasted and the investigational results, where the average difference is within 13.7%. Furthermore, it is found that minimum NO x emission was observed for an LPG flow rate in the range of 0.4-0.6 kg/h and when the engine is running with 75% loading. K E Y W O R D S crank angle, duel fuel, LPG flow rate, NO x emission, pilot fuel | INTRODUCTIONBetter fuel economy of diesel engines has gained importance over the years to be used as a prime mover in various applications, including the transport sector. The exponential growth of the demand, strict emission norms imposed by the regulatory bodies, and depleting sources of hydrocarbon-based fuels have necessitated the search for alternative fuel. Diesel engines, even How to cite this article: Murthy K, Srinivas VG, Kumar S. Modeling and prediction of NO x emission in an LPG-diesel dual fuel CI engine.

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Section: Burnt Gas Temperature Variation With Lpg Flow Ratementioning

confidence: 99%

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confidence: 99%

Modeling and prediction of NO_x emission in an LPG–diesel dual‐fuel CI engine

Murthy

Srinivas

2021

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“…In terms of the structural configuration, there are several kinds of mufflers: (i) with a single inlet/outlet or with more an inlet/outlet pipe; (ii) with a single chamber or multi-chamber structures; (iii) with and without absorbing structures (e.g., porous material, micro-perforated tube/wall) or dividing/tuning components (e.g., V-blade, resonant chamber, tube, wall). Noted that in real applications, some mufflers with hybrid geometry configurations (e.g., turbo structures with a circular flow path [3]) are used.…”

Section: Structure Designsmentioning

confidence: 99%

“…Expansion chamber mufflers have been used extensively in real industrial applications due to their prime function of noise treatment [1,2]. How these devices are to the best of their acoustical performance as well as other working functions (i.e., chemical and thermal properties [3]) is the research question addressed in many studies.…”

Section: Introductionmentioning

confidence: 99%

Tuning acoustic performance of multi-chamber hybrid mufflers

Trinh

2021

Vietnam J. Mech.

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In this paper, we investigate the functional acoustic performance of multi-chamber mufflers using a numerical approach. The wave propagation governing in expansion chamber domains is first introduced and solved by the finite element method. Our numerical results of selected muffler configurations are compared with the reference predictions model and experiments in order to validate the present procedure. Then, the influence of the geometry characteristics of typical and hybrid configurations of multi-chambered mufflers (number of sub-chambers, micro-perforated tube structure) on their sound transmission loss is studied. The obtained results indicate that the structure of the considered muffler has a strong effect on their acoustical performance, and the location and the high level of resonances of the sound transmission loss behavior are strongly related to the number of sub-chambers as well as micro-perforated tube characteristics. By tuning geometrical parameters (e.g., having a small perforation ratio), we enable to design mufflers having a higher sound transmission loss (up to 110 dB) at low frequencies (~ 195 Hz) but a constraint space (e.g., acoustic chamber length of 300 mm).

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“…The parameters controlling such constituents of exhaust are the engine speed, torque, brake specific fuel consumption, air fuel ratio, throttle etc. [3]. In order to minimize these harmful emissions, many attempts are made [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Emission and Friction Analysis of IC Engine Running in Methanol Blend

Gupta¹,

Mishra²

2018

Tribol. Ind.

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Emission and friction are considered to be the significant contributors towards engine parasitic losses. Inherent engine design responsible for such irregularities is difficult to eliminate totally, as millions of engines operating in such principle cannot be replaced. Therefore, only partial modification is allowed to achieve slight improvement in fuel economy and performance improvement. Such improvement is possible through condition monitoring of IC engine through emission and friction analysis. Using an emission analyzer, the emission gases such as CO, CO2, NOx, HC, lambda (air fuel ratio) are monitored for three different petrol and methanol blend (M5, M10, M15). The brake power response to rpm for different torque and speed are monitored from the engine coupled with eddy current dynamo meter and mounted in a universal engine test bed. Friction power loss is numerically estimated through tribological principles and validated with experimental results.

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Modeling for combined effect of muffler geometry modification and blended fuel use on exhaust performance of a four stroke engine: A computational fluid dynamics approach

Cited by 18 publications

References 17 publications

Modeling and prediction of NO_x emission in an LPG–diesel dual‐fuel CI engine

Modeling and prediction of NO_x emission in an LPG–diesel dual‐fuel CI engine

Tuning acoustic performance of multi-chamber hybrid mufflers

Emission and Friction Analysis of IC Engine Running in Methanol Blend

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Modeling for combined effect of muffler geometry modification and blended fuel use on exhaust performance of a four stroke engine: A computational fluid dynamics approach

Cited by 18 publications

References 17 publications

Modeling and prediction of NOx emission in an LPG–diesel dual‐fuel CI engine

Modeling and prediction of NOx emission in an LPG–diesel dual‐fuel CI engine

Tuning acoustic performance of multi-chamber hybrid mufflers

Emission and Friction Analysis of IC Engine Running in Methanol Blend

Contact Info

Product

Resources

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Modeling and prediction of NO_x emission in an LPG–diesel dual‐fuel CI engine

Modeling and prediction of NO_x emission in an LPG–diesel dual‐fuel CI engine