Investigation of evaporating sprays in a medium speed marine engine

Li, Haohan; Verschaeren, Roel; Beji, Tarek; Verhelst, Sebastian

doi:10.1016/j.expthermflusci.2020.110278

Cited by 8 publications

(6 citation statements)

References 46 publications

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“…Due to greater share of land-based diesel engines, most of the investigations on diesel sprays are focused on small nozzle diameter (range from 0.1 mm to 0.2 mm) injectors, much fewer data can be found on for medium speed marine diesel engines with large nozzle size. Li et al 16 discussed the evaporating sprays in medium speed marine engine via a constant volume combustion chamber with quartz windows of 150 mm in diameter, the results showed that the penetration is proportional to t 2/3 at lower ambient gas density (7.6 and 15.2 kg/m 3 ) and t 1/2 at high density (22.5 kg/m 3 ) conditions. Kowalski 17 investigated the effect fuel nozzle geometry on performance parameters and emissions from marine 4-stroke diesel engine.…”

Section: Introductionmentioning

confidence: 99%

Schlieren and mie-scattering visualization of an evaporating spray under marine diesel engine conditions

Liu

Huang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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Due to the critical influence on combustion, extensive research has been carried out to deepen the understanding of diesel spray evolution. However, for the greater share of land-based diesel engines, most of the studies have focused on the injectors with small nozzle diameter and rare studies can be found on marine diesel engines, which has a larger mass flow rate and longer injection duration with large nozzle diameter. In this study, the influence of injection pressure, ambient temperature, ambient density and nozzle diameter on spray morphology for medium speed marine diesel engine injectors (with nozzle diameter up to 0.53 mm) were investigated under various non-reacting but evaporative conditions. The experiments were performed via a highly enhanced constant volume chamber (highest temperature of 900 K and highest pressure of 8 MPa) with an optical window diameter of 205 mm. Liquid and vapor penetration of sprays were recorded by Mie-scattering and schlieren optical configurations respectively. Results show that the vapor penetration velocity is mainly affected by injection pressure. Ambient temperature has the most significant effect on liquid penetration length, but less effect can be found on the vapor penetration velocity. Given the obvious deviation from heavy duty engine sprays, the empirical correlations for liquid penetration length and vapor spray evolution are updated to fit the spray characteristics of medium speed marine diesel engine injectors, which is helpful to understand the spray behavior for large nozzle diameter injector under marine diesel engine conditions.

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Section: Introductionmentioning

confidence: 99%

Schlieren and mie-scattering visualization of an evaporating spray under marine diesel engine conditions

Liu

Huang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…The research on this aspect has been carried out for a long time. 32,33 The nozzle diameter varies from 0.1 to 0.45 mm, covering a variety of vehicle and marine engines. The fuel injection pressure is also increasing with the progress of technology.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations of aviation kerosene spray in different ambient conditions with various nozzle diameters and injection pressures

Wang

Zhang

Xia

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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The purpose of this study is to explore the spray characteristics of aviation kerosene (RP-3) under sub/trans/supercritical conditions and provide a reference for engine test research under advanced combustion mode. The experiment is carried out in a constant volume chamber. To understand the influence of nozzle diameter and injection pressure on spray characteristics of RP-3 under different critical conditions, 270 groups of spray images are collected under three nozzle diameters (100, 300, 450 μm), five injection pressures (60, 80, 100, 120, 140 MPa), and nine critical conditions. The macroscopic parameters are calculated and new empirical correlations are generated to investigate the axial and radial development of spray. The results show that kerosene spray has different spray characteristics under sub/trans/supercritical conditions. The effect of nozzle diameter on kerosene spray is stronger than that of diesel spray. The spray with a small nozzle diameter is easily affected by gas entrainment. The injection pressure has an insignificant effect on spray macroscopic characteristics, but high injection pressure is conducive to increasing the vapor phase ratio and promoting oil-gas mixing, especially under supercritical conditions. The new correlations have good agreement with kerosene experimental results.

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“…More detailed information about these methods can be found elsewhere. 33 , 34 Among these test rigs, constant volume spray chambers have the advantage of possessing a wide range of tested gas temperatures and pressures, 33 and therefore, it is the preferred technique used in this study.…”

Section: Introductionmentioning

confidence: 99%

“…Some examples of these test rigs are optical research engine (ORE), rapid compression machine (RCM), constant pressure flow rigs (CPFR), and constant volume spray chamber (CVSC). More detailed information about these methods can be found elsewhere. , Among these test rigs, constant volume spray chambers have the advantage of possessing a wide range of tested gas temperatures and pressures, and therefore, it is the preferred technique used in this study.…”

Section: Introductionmentioning

confidence: 99%

Spray Analysis of Biodiesels Derived from Various Biomass Resources in a Constant Volume Spray Chamber

et al. 2022

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This research aimed to analyze the spray characteristics of various biodiesels, which have rarely been investigated in terms of spray analysis in the literature compared to fossil diesel. For this purpose, four different methyl ester-type biodiesels were produced from canola, corn, cottonseed, and sunflower oils. These feedstocks were selected due to their wide availability in Turkey and being among the significant resources for biodiesel production. Measured physical properties of biodiesel samples showed that biodiesel fuels had, on average, 1.7 to 1.9 times higher viscosities, 5.3 to 6.6% larger densities, and 37 to 39.1% higher contact angle values than the reference diesel fuel. Spray characteristics of all fuels were experimentally examined in a constant volume spray chamber under chamber pressures of 0, 5, 10, and 15 bar and injection pressures of 600, 800, and 1000 bar. All tested biodiesels performed, on average, 3 to 20% longer spray penetration lengths, 5 to 30% narrower spray cone angles, and 5–18% lesser spray areas than the reference diesel fuel under chamber pressures of 5 and 10 bar. No significant differences occurred at 15 bar ambient pressure between biodiesels and diesel. In addition, analytical and empirical predictions showed that biodiesels had around 21.2–35.1% larger SMD values and approximately 7% lower air entrainment.

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Investigation of evaporating sprays in a medium speed marine engine

Cited by 8 publications

References 46 publications

Schlieren and mie-scattering visualization of an evaporating spray under marine diesel engine conditions

Schlieren and mie-scattering visualization of an evaporating spray under marine diesel engine conditions

Experimental investigations of aviation kerosene spray in different ambient conditions with various nozzle diameters and injection pressures

Spray Analysis of Biodiesels Derived from Various Biomass Resources in a Constant Volume Spray Chamber

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