Spray Chamber Designs and Optical Techniques for Fundamental Spray Investigations

Chintagunti, Sam Joe; Kalwar, Ankur; Kumar, Dhananjay; Ágarwal, Avinash Kumar

doi:10.1007/978-981-16-1582-5_5

Cited by 2 publications

(2 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At this impinging condition, the spray atomization undergoes different processes compared to those of free spray. Two main primary differences are the improvement of the secondary break-up process due to smaller droplets formation at a large Weber number, and the reduction of unburned hydrocarbon and soot emission, due to liquid film formation at a low Weber number [49][50][51][52][53]. The interaction of wall and spray, mainly taking place in the small-bore high-speed diesel engine, not only has significant effects on mixture formation, but also on the combustion, as well as the emission process in the cylinder.…”

Section: Spray Atomizationmentioning

confidence: 99%

See 1 more Smart Citation

Diesel Spray: Development of Spray in Diesel Engine

Djamari

Idris²,

Paristiawan³

et al. 2022

Sustainability

View full text Add to dashboard Cite

Research and development in the internal combustion engine (ICE) has been growing progressively. Issues such as air pollution, fuel cost, and market competitiveness have driven the automotive industry to develop and manufacture automobiles that meet new regulation and customers’ needs. The diesel engine has some advantages over the gasoline or spark ignition engine, including higher engine efficiency, greater power output, as well as reliability. Since the early stage of the diesel engine’s development phase, the quest to obtain better atomization, proper fuel supply, and accurate timing control, have triggered numerous innovations. In the last two decades, owing to the development of optical technology, the visualization of spray atomization has been made possible using visual diagnostics techniques. This advancement has greatly improved research in spray evolution. Yet, a more comprehensive understanding related to these aspects has not yet been agreed upon. Diesel spray, in particular, is considered a complicated phenomenon to observe because of its high-speed, high pressure, as well as its high temperature working condition. Nevertheless, several mechanisms have been successfully explained using fundamental studies, providing several suggestions in the area, such as liquid atomization and two-phase spray flow. There are still many aspects that have not yet been agreed upon. This paper comprehensively reviews the current status of theoretical diesel spray and modelling, including some important numerical and experimental aspects.

show abstract

Section: Spray Atomizationmentioning

confidence: 99%

“…Different nozzle structure could lead to different spray behavior [86][87][88][89][90]. The sac refers to the part of an injector that looks like a small bag and contains liquid fuel [51,[80][81][82]. As a result, nozzles with this geometry can lead to unburned hydrocarbon left in the sac.…”

Section: Factors Affecting Spray Evolutionmentioning

confidence: 99%

Diesel Spray: Development of Spray in Diesel Engine

Djamari

Idris²,

Paristiawan³

et al. 2022

Sustainability

View full text Add to dashboard Cite

show abstract

Water-film thickness imaging based on time-multiplexed near-infrared absorption with up to 500 Hz repetition rate

et al. 2023

View full text Add to dashboard Cite

We demonstrate high-repetition-rate imaging of the liquid-film thickness in the 50–1000 µm range resulting from impinging water droplets on a glass surface. The pixel-by-pixel ratio of line-of-sight absorption at two time-multiplexed near-infrared wavelengths at 1440 and 1353 nm was detected with a high-frame-rate InGaAs focal-plane array camera. Frame rates of 1 kHz and thus measurement rates of 500 Hz could be achieved, well suited to capture the fast dynamics of droplet impingement and film formation. The droplets were sprayed onto the glass surface using an atomizer. Suitable absorption wavelength bands for water droplet/film imaging were determined from Fourier-transform infrared (FTIR) spectra of pure water between 298 and 338 K. At 1440 nm, the water absorption is nearly temperature-independent, making the measurements robust against temperature fluctuations. Time-resolved imaging measurements capturing the dynamics of the water droplet impingement and evolution were successfully demonstrated.

show abstract

Spray Chamber Designs and Optical Techniques for Fundamental Spray Investigations

Cited by 2 publications

References 83 publications

Diesel Spray: Development of Spray in Diesel Engine

Diesel Spray: Development of Spray in Diesel Engine

Water-film thickness imaging based on time-multiplexed near-infrared absorption with up to 500 Hz repetition rate

Contact Info

Product

Resources

About