Influence of Swirl on High Pressure Injection in Hydra Diesel Engine

Rao, K. K.; Winterbone, D. E.; Clough, E.

doi:10.4271/930978

Cited by 24 publications

(12 citation statements)

References 11 publications

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“…Strong swirl increases the relative velocity between the spray and air, thus increasing the heat and mass transfer between the liquid and gaseous phases. It also spreads the spray over a wider region in the direction of swirl increasing the lean flame region downstream of the spray center-line [10,17]. Combustion-induced flows have also been found to considerably affect the air-fuel mixing with swirl [16,18].…”

Section: Swirlmentioning

confidence: 97%

“…Under high load condition the smoke emissions are reduced by increasing the swirl level from 0.5 MSR to 1.5 MSR but no improvement in smoke emissions is seen by further increasing the swirl to 3.0 MSR. The increase in swirl enhances the air-fuel mixing process, inducing a faster distribution of fuel and accelerating flame propagation [10,14]. This causes a more intense premixed combustion phase and consequently a faster increment of in-cylinder pressure during the early stages of the combustion process.…”

Section: Comparison Of a Cluster With The Conventional Nozzle For Effmentioning

confidence: 99%

“…Increased swirl normally reduces particulate emissions but produces higher NO x [10,13]. Swirl in diesel combustion provides for better air-fuel mixing and improves air-utilization [14].…”

Section: Swirlmentioning

confidence: 99%

“…Other parameters such as Injection pressure, orifice diameter and piston shape also play a major role in the mixing process. Therefore the swirl level should be carefully matched with the other parameters [10][11][12].…”

Section: Swirlmentioning

confidence: 99%

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Investigation of Cluster-Nozzle Concepts for Direct Injection Diesel Engines

Won

Peters

2009

Atomiz Spr

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Section: Swirlmentioning

confidence: 97%

Section: Comparison Of a Cluster With The Conventional Nozzle For Effmentioning

confidence: 99%

“…Increased swirl normally reduces particulate emissions but produces higher NO x [10,13]. Swirl in diesel combustion provides for better air-fuel mixing and improves air-utilization [14].…”

Section: Swirlmentioning

confidence: 99%

Section: Swirlmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of Cluster-Nozzle Concepts for Direct Injection Diesel Engines

Won

Peters

2009

Atomiz Spr

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“…The results used for this paper are photographs obtained from the high-speed camera during the period of combustion when the image in the combustion chamber is self-illuminating-basically the image is that of incandescent carbon (or soot) particles. The use of a coppervapour laser enables images of the fuel sprays prior to combustion to be obtained, and a further system is used to calibrate the films when they are used to evaluate temperatures: these aspects of the project have been described in [3,4,5]. Figure 2 shows the layout of the combustion chamber in plan and sectioned side elevation.…”

Section: Image Acquisitionmentioning

confidence: 99%

Measurement of the flow field in a diesel engine combustion chamber after combustion by cross-correlation of high-speed photographs

Sun¹,

Yates²,

Winterbone³

1996

Experiments in Fluids

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A cellular cross-correlation technique is applied to high-speed photographs of the luminous phase of combustion in a high-speed direct-injection diesel engine. The method enables the velocity and vorticity distributions in the combustion chamber to be evaluated. The results obtained from the basic technique are refined to remove spurious results and to complete the definition of the flow field by applying data validation, interpolation, and smoothing. The velocity and vorticity fields evaluated at two swirl ratios show the way in which the basically solid body swirl motion interacts with the fuel jets in the combustion chamber. A better understanding of the post-combustion fluid motion is obtained, and this should be of help in validating CFD codes and also the design of engines.

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Modeling and Simulation of Diesel Engines Using CFD and Its Applications in Optimizing Various In-Cylinder Techniques

Menon

Mittal

2021

Energy, Environment, and Sustainability

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A four-stroke IC engine cycle undergoes the following processesintake, compression, combustion, expansion and exhaust, which are governed by complex fluid dynamics, chemical kinetics and heat transfer phenomena and occur in milli/nanosecond timescales inside the engine cylinder making it difficult to visualize experimentally. A better understanding of the in-cylinder phenomena helps design better engines in terms of performance, fuel consumption and emissions. Optimization of the engine processes through physical testing can be time and cost intensive. CFD analysis helps visualize the various in-cylinder processes, analyze them better and evaluate various engine optimization parameters without having to test on an actual engine, hence it is comparatively effortless to do back-to-back comparisons to identify the effect of a single parameter, which reduces the engine development time and cost drastically. CFD analysis of Diesel engines is particularly useful since there are many in-cylinder optimization parameters in a diesel engine in comparison with a conventional gasoline engine, due to the direct injection and heterogeneous nature of combustion. This chapter aims to give an overview of the general methodology followed in performing CFD simulations in diesel engines towards the objective of enhancing the performance and minimizing the fuel consumption and emissions. Here a comprehensive coverage of the complete process of modeling and simulation is attempted, starting with the basic input data required, typical assumptions used, fundamental governing equations and discretization, model formulation, initial conditions, boundary conditions, model validation, various sub-models used and the analysis of results. The effect of in-cylinder techniques like combustion chamber geometry, injection timing, multiple injections and exhaust gas recirculation on performance and emissions is discussed through a brief review of published literature. It is hoped that the reader will get an insight into the procedure followed in diesel engine CFD analysis and some of its applications in the optimization through various in-cylinder techniques.

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Influence of Swirl on High Pressure Injection in Hydra Diesel Engine

Cited by 24 publications

References 11 publications

Investigation of Cluster-Nozzle Concepts for Direct Injection Diesel Engines

Investigation of Cluster-Nozzle Concepts for Direct Injection Diesel Engines

Measurement of the flow field in a diesel engine combustion chamber after combustion by cross-correlation of high-speed photographs

Modeling and Simulation of Diesel Engines Using CFD and Its Applications in Optimizing Various In-Cylinder Techniques

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