Experimental investigation on spray-wall impingement characteristics of n-butanol/diesel blended fuels

Yu, Hanzhengnan; Liang, Xingyu; Shu, Gequn; Wang, Yuesen; Zhang, Hongsheng

doi:10.1016/j.fuel.2016.05.115

Cited by 52 publications

(15 citation statements)

References 30 publications

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“…Regardless of whether the wall is dry or wet, the adhering ratio of B25 is higher than that of B15. This result may be consistent with Reference [32], which shows that higher n-butanol ratios imply a lower spreading radius and higher impinged spray heights interact with air. Due to the normal pressure and temperature, the masses for evaporation of the two blends that were sprayed before impinging were not significantly different.…”

Section: Development Of Adhering Fuel Mass Ratiosupporting

confidence: 93%

“…In our previous work [30][31][32], we have studied the effect of the injection parameters, ambient parameters, and fuel characteristics on the impingement process and adhered film distribution. However, according to the analysis above, the surface condition of the impinged wall also plays a significant role in droplets' adhesion and splashing.…”

Section: Introductionmentioning

confidence: 99%

“…We expected to establish methods to control the fuel-adherence phenomenon. A report by Sakda [33] indicates that the appropriate volumetric fraction of n-butanol should be close to 20%, and based on Reference [32], the adhered film ratio did not changed much when the blended ratio was lower than 20%. Therefore, the volumetric ratios for n-butanol in this work were 15% and 25% and were referred to as B15 and B25, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation on Effect of Wall Roughness and Lubricant Film on the Adhered Fuel Film of N-Butanol-Diesel Blends after Spray Impingement

et al. 2018

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Abstract:The effect of wall roughness with different lubricant film thicknesses on the characteristics of adhered fuel films of diesel-n-butanol blending fuels after spray impingement has been investigated. Four steel plates with different types of roughness (root mean square height-Sq) that were coated with different lubricant film thicknesses (h l ) were used as impinged walls. The experimental conditions included dry walls (h l = 0), semi-wetted walls (SWW) with different thin oil films (0 < h l /Sq < 1), and fully wetted walls (FWW) with a thick lubricant film (h l > Sq). The results indicate that the adhered fuel mass ratio (ε) of blended fuel with 25% n-butanol (B25) was higher than that of blended fuel with 15% n-butanol (B15) under the same conditions. ε increased with an increase in Sq on the dry walls, but, under SWW conditions, it decreased with an increase in oil film thickness. The fuel film morphology was almost unaffected by the change in Sq, but the results implied that the roughness parameter-Skewness (Ssk) exerted a greater impact. The mean thickness h a and accumulated diameter D l of the adhered fuel film increased with an increase in h l , but, under FWW conditions, the effect of the roughness on the adhered film's features was insignificant.

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Section: Development Of Adhering Fuel Mass Ratiosupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation on Effect of Wall Roughness and Lubricant Film on the Adhered Fuel Film of N-Butanol-Diesel Blends after Spray Impingement

et al. 2018

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“…The spray cone angle is a global parameter and is subject to the ambient air density. Some scholars have pointed out that the droplet distribution of spray impingement clothing from the stagnation flow model was affected by the droplets before impingement [22,23].…”

Section: Appl Sci 2018 8 X For Peer Review 8 Of 11mentioning

confidence: 99%

Experiment and Simulation Investigation on the Characteristics of Diesel Spray Impingement Based on Droplet Impact Phenomenon

Liu

et al. 2018

Applied Sciences

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Abstract:In order to study the characteristics of diesel spray impinging in small-size internal combustion (IC) engine, the laboratorial platform of spray impingement is used to visualize the droplet impact phenomenon. A high-speed camera is used to record the whole process of the spray. An experimental research is accomplished under the impingement phenomenon of diesel spray on the wall with a fixed injection volume of 25 mg, injection pressure of 40 MPa, wall-injector distance of 40mm and orifice diameter of 0.26 mm. The computational fluid dynamics (CFD) simulation is carried out and the turbulence kinetic energy (TKE) distribution diagram is obtained. The results show that the maximum spray radius is 29.3 mm and maximum spray height is 10.2 mm at 2.8 ms. The spray impingement phenomenon presents the "blanket" shape. The simulation results are similar to the experimental results with the average error of the spray height within 3%.

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“…A constant-volume vessel with a common-rail injection system is linked to an image capture and data acquisition system, as shown in Figure 1 [29]. A single-hole nozzle (diameter of 0.25 mm) injector is used to inject diesel or DME/diesel blended fuels at pressure from 60 MPa to 120 MPa and the energizing duration is fixed at 1 ms.…”

Section: Constant-volume Vesselmentioning

confidence: 99%

Experimental Investigation on Wall Film Distribution of Dimethyl Ether/Diesel Blended Fuels Formed during Spray Wall Impingement

Liang

Shu

et al. 2016

Energies

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Dimethyl ether (DME)/diesel blended fuels are used to improve the emissions caused by spray wall impingement during the early injection period. However, experimental results have showed that the spray wall impingement still cannot be avoided due to the engine structure and low density of the in-cylinder charge at the early injection timing. Furthermore, the wall film formed in the spray wall impingement process directly affects fuel/air mixture formation, combustion, exhaust emissions and oil quality subsequently. In this paper, the wall film distribution of DME/diesel blended fuels formed during the spray wall impingement process has been experimentally investigated. The variations of wall film distribution, wall film area and average thickness with different injection pressures, impingement distances, impingement angles and blending ratios have been discussed under both dry wall and wet wall conditions. Results showed that the wall film distribution styles were mainly determined by the spray impingement momentum. The variation of the wall film area and average thickness were affected by three factors including the impingement momentum, wall film mass and fuel properties. Correlation analysis was introduced in order to evaluate the effect of each impact factor on the variation of wall film area and average thickness.

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Experimental investigation on spray-wall impingement characteristics of n-butanol/diesel blended fuels

Cited by 52 publications

References 30 publications

Experimental Investigation on Effect of Wall Roughness and Lubricant Film on the Adhered Fuel Film of N-Butanol-Diesel Blends after Spray Impingement

Experimental Investigation on Effect of Wall Roughness and Lubricant Film on the Adhered Fuel Film of N-Butanol-Diesel Blends after Spray Impingement

Experiment and Simulation Investigation on the Characteristics of Diesel Spray Impingement Based on Droplet Impact Phenomenon

Experimental Investigation on Wall Film Distribution of Dimethyl Ether/Diesel Blended Fuels Formed during Spray Wall Impingement

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