Influence of Elevated Fuel Temperatures on the Spray Characteristics of Gasoline

Influence of Elevated Fuel Temperatures on the Spray Characteristics of Gasoline—Ethanol Blends

Published:2022-12-05 Issue:3 Volume:145 Page:
ISSN:0742-4795
Container-title:Journal of Engineering for Gas Turbines and Power
language:en
Short-container-title:

Author:

Miganakallu Niranjan¹,Purushothaman Ashwin Karthik²,Atkinson William R.³,Peters Nathan⁴,Amaral Tadeu Miguel Malago⁵,Leite Antonio Galdino⁵,Yoshino Fernando Jun⁵,Bunce Michael⁴,Ra Youngchul⁶,Naber Jeffrey D.⁷

Affiliation:

1. Engine Research Center, Department of Mechanical Engineering, University of Wisconsin Madison , 119, Engineering Research Building, 1500 Engineering Drive, Madison, WI 53705

2. Department of Mechanical Engineering - Engineering Mechanics, Michigan Technological University , 1400 Townsend Drive, Houghton, MI 49931

3. Advanced Power Systems Research Center, Michigan Technological University , 1400 Townsend Drive, Houghton, MI 49931

4. MAHLE Powertrain LLC , 14900 Galleon Court, Plymouth, MI 48170

5. MAHLE Powertrain LLC , Rodovia Anhanguera, sentido interior - capital, km 49,7, Jundiaí 13.210-877, Brazil

6. Department of Mechanical Engineering - Engineering Mechanics, Michigan Technological University , 907, R. L. Smith Building, 1400 Townsend Drive, Houghton, MI 49931

7. Department of Mechanical Engineering - Engineering Mechanics, Michigan Technological University , 1011, R. L. Smith Building, 1400 Townsend Drive, Houghton, MI 49931

Abstract

Abstract In this study, the effect of elevated fuel temperatures on the spray characteristics of gasoline—ethanol blends was studied in an optically accessible constant volume spray and combustion vessel. MAHLE SmartHeat® is a fuel heater located directly upstream of the fuel injector. High speed images of the spray injected from a six-hole gasoline direct injection injector typical of a side-injection engine were captured with shadowgraph imaging technique. Two fuel blends, gasoline with 10% ethanol (E10) and 85% ethanol (E85) were investigated at ambient conditions of 1 bar, 45 °C and 4 bar, 180 °C at an injection pressure of 100 bar. Fuel temperatures were varied from 75 to 250 °C. A comparison of the near nozzle and the global spray characteristics was made for the two fuels in the range of fuel temperatures selected. Results showed that flash boiling leads to two primary effects for the two fuel blends: (i) an appreciable increase in spray angle near the exit of the nozzle followed by (ii) a decrease in spray angle downstream of the nozzle due to the interaction of the plumes and the collapsing of the spray. Furthermore, for both fuel blends, upon flash boiling, entrainment and mixing were reduced downstream of the nozzle because of the collapse of the spray. To reduce this effect, nozzle orientations and geometries should be modified.

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

Link

https://asmedigitalcollection.asme.org/gasturbinespower/article-pdf/145/3/031007/6953686/gtp_145_03_031007.pdf

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