Publicou 12 edições por ano
ISSN Imprimir: 1044-5110
ISSN On-line: 1936-2684
Indexed in
A COMPARISON OF DIESEL AND JATROPHA METHYL ESTER (JME) SPRAY CHARACTERISTICS: EFFECT OF NOZZLE ENTRY RADIUS
RESUMO
In the present article, diesel and Jatropha methyl ester (JME) sprays are compared in a detailed manner in terms of their macroscopic and microscopic spray characteristics. The comparison is made at injection pressures of 500,1000, and 1500 bar by injecting the fuels through a nozzle having a single hole of 200 µm diameter and 70 µm entry radius into a spray chamber (with optical access). From the measurements of macroscopic spray structure, it is observed that the spray tip penetration is faster and spray cone angle is narrower by approximately 10% for JME than those of diesel, indicating that the JME spray atomization is poor. Droplet sizes are measured for diesel and JME sprays at 4 ms after the start of injection using particle/droplet image analysis, which showed that the Sauter mean diameter (SMD) of JME sprays is higher by around 5% as compared to that of diesel. Subsequently, a nozzle with a hole diameter of approximately 200 µm having an entry radius of10 µm is studied to understand the effect of nozzle entry radius on breakup of diesel and JME sprays. Computational fluid dynamic modeling of inner-nozzle flow showed that there is significant inner-nozzle cavitation for this nozzle. A comparison of spray structure at injection pressures of 500 and 1500 bar showed that the spray tip penetration is slower and spray cone angles are wider by approximately 5% to 12% for sprays from the cavitating nozzle than those from the noncavitating nozzle. Droplet size comparison showed that SMD of spray from the cavitating nozzle is lower by approximately 5% as compared to that from the noncavitating nozzle. Thus improvement in spray atomization due to inner-nozzle cavitation may be able to compensate for the inferior atomization of JME, although with an associated penalty in the coefficient of discharge.
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López J Javier, de la Garza Oscar A, De la Morena Joaquin, Martínez-Martínez S, Effects of cavitation in common-rail diesel nozzles on the mixing process, International Journal of Engine Research, 18, 10, 2017. Crossref
-
Sharma Saurabh, Kumar Rohit, Chowdhury Arindrajit, Yoon Youngbin, Kumar Sudarshan, On the effect of spray parameters on CO and NO x emissions in a liquid fuel fired flameless combustor, Fuel, 199, 2017. Crossref
-
Payri R., Salvador F.J., De la Morena J., Pagano V., Experimental investigation of the effect of orifices inclination angle in multihole diesel injector nozzles. Part 2 – Spray characteristics, Fuel, 213, 2018. Crossref
-
Potdar Umesh, Jamgade Ajinkya, Mahyavanshi P., Yoon Y., Kumar Sudarshan, Experimental Investigations on Stabilization Mechanism of Lifted Kerosene Spray Flames, Combustion Science and Technology, 189, 7, 2017. Crossref
-
Boggavarapu Prasad, Ravikrishna R.V., Quantitative vapour concentration measurements in n-dodecane and n-hexadecane sprays, Experimental Thermal and Fluid Science, 102, 2019. Crossref
-
Potdar Umesh, Pawar Omkar, Sikka Raghav, Kumar Sudarshan, Experimental investigations on the stabilization of lifted kerosene spray flames with coflow air, Combustion Science and Technology, 190, 10, 2018. Crossref
-
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-
Das Mithun, Sarkar Mouktik, Datta Amitava, Santra Apurba Kumar, Study on viscosity and surface tension properties of biodiesel-diesel blends and their effects on spray parameters for CI engines, Fuel, 220, 2018. Crossref
-
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-
Rizal Teuku Azuar, Khairil , Mahidin , Husin Husni, Ahmadi , Nasution Fahrizal, Umar Hamdani, The Experimental Study of Pangium Edule Biodiesel in a High-Speed Diesel Generator for Biopower Electricity, Energies, 15, 15, 2022. Crossref
-
Badhuk Pabitra, Ravikrishna R.V., Flame inhibition by aqueous solution of Alkali salts in methane and LPG laminar diffusion flames, Fire Safety Journal, 130, 2022. Crossref
-
Ramanan C. J. , Bora Bhaskor J., Alom Nur , Buradi Abdulrajak , Shukla Shivam , INVESTIGATION OF DEAD-END FILTRATION OF CRUDE BIODIESEL USING REVERSE OSMOSIS MEMBRANE THROUGH CFD SIMULATION , International Journal of Energy for a Clean Environment, 23, 6, 2022. Crossref