Experimental study on spray and atomization characteristics under subcritical, transcritical and supercritical conditions of marine diesel engine

Xia, Jin; Huang, Zhong; Xu, Leilei; Ju, Dehao; Lü, Xingcai

doi:10.1016/j.enconman.2019.05.080

Cited by 50 publications

(18 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Test outcomes showed that the vapor phase penetration and spreading angle were relatively higher than the single-pass by comparing the optical Setup. Xia et al 15 have experimentally analyzed for spray and atomization properties on a marine engine. The test results discussed that the spray liquid boundary was smoother and better balance with lower penetration at critical environments.…”

mentioning

confidence: 99%

Experimental study of spray analysis for Palmarosa biodiesel‐diesel blends in a constant volume chamber

Sathiyamoorthi¹,

Gomathinayakam

Munuswamy³

et al. 2021

Env Prog and Sustain Energy

View full text Add to dashboard Cite

The diesel spray process is one of the critical development zones in terms of diesel engine-out emission regulations. Detailed analysis of Palmarosa oil methyl esters fuel spray properties has been studied and made a comparison analysis with mineral diesel. Experiments under various injection pressures (200, 225, and 250 bars) have been investigated in a constant volume chamber (CVC). Studies have shown that the longest and shortest spray tip penetrations (STPs) for biodiesel and diesel were observed. A higher spray cone angle of about 17.5 ms for PMO fuels and 11.4 ms for diesel were found. The Sauter mean diameter for all test blends decreased with an increase in fuel injection pressure with the maximum reduction of 15 μm. Additionally, the spray volume of 0.4 cm 3 and spray area of 5 cm 2 increased respectively during 250 bars injection pressure. STP increased by 14.3 ms for Palmarosa oil methyl ester than diesel at 250 bars injection pressure. It is concluded that the fuel properties such as density and viscosity are the main influencing factors for spray analysis and play a significant role in the fuel injection system.

show abstract

mentioning

confidence: 99%

Experimental study of spray analysis for Palmarosa biodiesel‐diesel blends in a constant volume chamber

Sathiyamoorthi¹,

Gomathinayakam

Munuswamy³

et al. 2021

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…Because the difference in spray tip penetration is significant even after the end of injection, it is assumed that the difference in the absolute value of the supply momentum, rather than the injection duration, determines the axial development of spray. 39 Figure 4 shows the spray images for various HFRs at different injection pressures. Fast development of spray is observed in higher HFR condition, and fuel cut-off timing is advanced as HFR increases, which is consistent with the injection rate measurement result for the corresponding injection duration.…”

Section: Resultsmentioning

confidence: 99%

Effect of hydraulic flow rate, injection timing, and exhaust gas recirculation on particulate and gaseous emissions in a light-duty diesel engine

Mohiuddin

Choi

Park

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

Nozzle hydraulic flow rate is a critical parameter that affects the combustion process and plays a vital role in the production of emissions from a diesel engine. In this study, injection characteristics, such as normalized injection rate and spray tip penetration, were analyzed for different hydraulic flow rate injectors with the help of spray experiments. To further investigate the effects of hydraulic flow rate on engine-out particulate and gaseous emissions, engine experiments were performed for different values of hydraulic flow rate in multiple injectors. Various operating conditions and loading configurations were examined, and the effects of varying start of injection and exhaust gas recirculation rates for different hydraulic flow rates were analyzed. A separate Pegasor Particle Sensor (PPS-M) sensor was used to measure and collect data on the particle number, and an analysis was conducted to investigate the relation of particle number with hydraulic flow rate, injection timing, and exhaust gas recirculation rate. Results of the spray experiment exhibited a decreasing injection duration and increasing spray tip penetration with increasing hydraulic flow rate. Effect of hydraulic flow rate on combustion and emission characteristics were analyzed from engine experiment results. Least ignition delay was achieved using a smaller hole diameter, retarded injection timing, and lowest EGR%. Higher hydraulic flow rate with retarded injection timing and higher EGR% helped in reduction of NOx emissions and brake-specific fuel consumption, but particulate emissions were increased. Best particulate matter–NOx trade-off was achieved with lowest hydraulic flow rate.

show abstract

“…PIV technique has been used previously by many researchers. Xia et al Xia et al (2019) have studied in details the atomization of diesel spray in marine diesel scale concluding that the liquid phase of the spray is smooth and stable compared showing shorter penetration. Increasing the ambient pressure leads to decrease in tip velocity.…”

Section: Introductionmentioning

confidence: 99%

PIV measurements of entrainment process of directly injected media in internal combustion engines

Abdelhameed¹,

Aoyagi²,

Tashima³

et al. 2021

ISPIV21

View full text Add to dashboard Cite

PIV measurements have been successfully applied to various flow fields relating internal combustion engines such as in-cylinder air motion, air flow in an intake port, and even a discharging passage of an ignition plug. Measurements of induced air motion around diesel sprays can be said to be a significant example of the PIV applications because the air motion is reflected in an unsteady complicated flow structure. Instead of the apparent entrainment exaggerated by spray droplet dispersing, substantial air entrainment through momentum exchange between liquid and gas was finally obtained by combining PIV and spray profile observation. PIV measurements of this kind were extensionally applied to other direct fluid injection by the authors. The second object was a high-pressure gas jet directly injected under gas pressure as high as 30 MPa. It was found the gas jet has strong air entrainment through momentum exchange in a single gaseous phase between fuel gas and ambient air. The third directly injected medium in internal combustion engines should be torch flame ejected from nozzle holes of a pre-combustion chamber (PCC) to a main combustion chamber (MCC) of a so-called DF (dual-fuel) engine. In this study, mixture entrainment process of torch flames is discussed on the PIV results for the first time. However, chamber configurations of a real DF engine are hard to simulate since itrequires several auxiliary PCC devices such as an ignition plug, a sub gas injector, and so on. All of them should be actuated synchronously with an engine crank angle. In the case of a constant volume vessel (CVV), the synchronization is not necessary, but the mixture control in the PCC becomes problematic because of the lack of compression and expansion strokes that assures PCCgas exchange. For overcoming the situation, rupture of a membrane was introduced in this study. The membrane turns the upper part of the PCC into an air pressure reservoir and low-pressure air jets eject from the nozzle holes after a solenoid-driven needle pierces the membrane for rupturing. The differential pressure between the upper chamber and the lower one was chosen as a main parameter of the experiment. Since the measurements and analysis of the entrainment of the low-pressure air jets are yet to finalize, the outlook of the CVV, the PIV specifications, and prime results of the air entrainment are attached herewith. After all, the PIV measurements revealed essential difference among air entrainment processes of the above three directly injected media in internal combustion engines.

show abstract

Experimental study on spray and atomization characteristics under subcritical, transcritical and supercritical conditions of marine diesel engine

Cited by 50 publications

References 47 publications

Experimental study of spray analysis for Palmarosa biodiesel‐diesel blends in a constant volume chamber

Experimental study of spray analysis for Palmarosa biodiesel‐diesel blends in a constant volume chamber

Effect of hydraulic flow rate, injection timing, and exhaust gas recirculation on particulate and gaseous emissions in a light-duty diesel engine

PIV measurements of entrainment process of directly injected media in internal combustion engines

Contact Info

Product

Resources

About