A Study of Some Combustion Characteristics of Gas Oil/Water Emulsions in a Swirl Chamber Diesel Engine

Radwan, M. S.; Salem, Hesham A.

doi:10.4271/892056

Cited by 6 publications

(8 citation statements)

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“…For water in diesel of 30%, the engine could not run at compression ratios below 22. For lower compression ratios and higher amounts of water, the ignition delay period increases (Radwan and Salem, 1989) and this appears to be the main factor causing the engine to fail to run. The engine could run at higher amounts of water if the compression ratio increases more or a cetane improver has been used.…”

Section: Downloaded By [Northeastern University] At 13:39 28 Novembermentioning

confidence: 95%

“…Advancing the fuel injection timing in Figure 3b increased the maximum pressure at all water contents. Advancing the injection timing appears to increase the ignition delay and this leads to higher maximum pressure and higher maximum pressure rise rate (Radwan and Salem, 1989). Increasing …”

Section: Maximum Combustion Pressurementioning

confidence: 98%

“…Examining the figure shows that the maximum pressure rise rate decreases with increasing the engine speed, increasing the compression ratio, increasing the engine torque output, and retarding the injection timing. It has been shown that the main reason affecting the maximum pressure rise rate is the ignition delay period (Radwan and Salem, 1989). Increasing the engine speed enhances the mixing and vaporization of fuel in the air and produces shorter delay.…”

Section: Maximum Combustion Pressure Rise Ratementioning

confidence: 99%

“…The improved mixing also assists in the reduction in the NO x emissions from the diffusive burning portion of the combustion event as well as reducing the carbon formation. This effect, together with the chemical effect of the water, results in an increased ignition delay (Greeves et al, 1976;Radwan and Salem, 1989). This promotes an increase in the premixed portion of the combustion process, which decreases the diffusive burning and hence also contributes to the reduction in the NO x emissions and carbon formation (Andrews et al, 1987).…”

Section: Introductionmentioning

confidence: 96%

“…They, however, did not prove the stability of the emulsion for a long time. Most of the work published about using the water diesel emulsion did not study the stability of such emulsion, but either used another injector to inject the water inside the combustion chamber or used a mixing device inside the engine tank with small water/diesel ratios of up to 10% (Radwan and Salem, 1989).…”

Section: Introductionmentioning

confidence: 99%

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Combustion Study of Stabilized Water-in-Diesel Fuel Emulsion

Selim

Ghannam

2009

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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An experimental investigation has been carried out to produce a stable diesel/water emulsion fuel and use it in a diesel engine under different operating and design conditions. The emulsion stayed stable for up to 30% water in diesel for up to one week and 20% water in diesel for four weeks. The physical properties of the stable W/D emulsions in terms of density, surface tension, and viscosity were measured and investigated. The effect of surfactant concentration, mixing time, and mixer speed has been studied. A computer image analyzer system was used to investigate the water droplets-fuel interaction and the water droplets distribution within the diesel phase. The stable emulsion has been used in an indirect injection Ricardo E6 research diesel engine, and performance and engine roughness parameters have been measured. The effect of water/diesel ratio, engine speeds, loads, fuel injection angle, and engine compression ratio on combustion maximum pressure, maximum pressure rise rate, brake power output, and brake-specific fuel consumption has been studied. The addition of water in diesel generally affected the engine combustion noise, brake power output, and specific fuel consumption.

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Section: Downloaded By [Northeastern University] At 13:39 28 Novembermentioning

confidence: 95%

Section: Maximum Combustion Pressurementioning

confidence: 98%

Section: Maximum Combustion Pressure Rise Ratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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