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Breakup length on Urea Water Solution jet in hot cross flow

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Breakup length on Urea Water Solution jet in hot cross flow

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dc.contributor.author P, Senthilkumar es_ES
dc.contributor.author Bakshi, Shamit es_ES
dc.contributor.author T.N.C, Anand es_ES
dc.date.accessioned 2018-04-12T11:32:07Z
dc.date.available 2018-04-12T11:32:07Z
dc.date.issued 2017-07-28
dc.identifier.isbn 9788490485804
dc.identifier.uri http://hdl.handle.net/10251/100303
dc.description.abstract [EN] Selective Catalytic Reduction (SCR) using Urea-Water Solution (UWS) as an ammonia precursor is considered as one of the best choices to meet the current stringent emission norms for reduction of NOX in diesel engines. UWS sprayed in the engine exhaust line forms ammonia, and this ammonia reduces NOX into nitrogen. The NOX reduction efficiency depends on the mixing and evaporation behavior of the UWS spray in the hot exhaust gas. Spray characteristics decide the evaporation rate and hence the NOX reduction efficiency. The spray structure is closely related to the breakup point and breakup mode of the jet. Hence, in this study, breakup length and breakup mode were investigated by injecting UWS (32.5 % by weight) through a nozzle in a hot air cross flow. A CCD camera and pulsed Nd:Yag laser were used for capturing the images. Experiments were conducted with varying nozzle size (150, 250 and 400 micron), injection pressure (0.5 to 3 bar), temperature (32 °C,150 °C and 200 °C) and air flow rate. The effect of operating parameters (nozzle size, injection pressure, air temperature and velocity) in terms of dimensionless numbers (Weber number and momentum flux ratio) on jet breakup mode and jet breakup length was studied. It was observed that the breakup length for UWS was close to that of water. The jet breakup length increases with momentum flux ratio since a jet having a higher momentum is able to penetrate a larger distance in the cross flow. Increasing the air temperature increases the velocity of the cross flow and hence reduces the breakup length. A correlation for jet breakup length was developed. The effect of inclusion of Weber number in the breakup length correlation, in addition to the momentum flux ratio, was studied. Visual observation shows that droplet sizes obtained from the plain orifice injector without preheating is large. Preheating the UWS before injection is recommended to reduce the droplet size. es_ES
dc.format.extent 8 es_ES
dc.language Inglés es_ES
dc.publisher Editorial Universitat Politècnica de València es_ES
dc.relation.ispartof Ilass Europe. 28th european conference on Liquid Atomization and Spray Systems es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject UWS es_ES
dc.subject Cross flow es_ES
dc.subject Breakup length and laser diagnostics es_ES
dc.title Breakup length on Urea Water Solution jet in hot cross flow es_ES
dc.type Capítulo de libro es_ES
dc.type Comunicación en congreso es_ES
dc.identifier.doi 10.4995/ILASS2017.2017.4982
dc.rights.accessRights Abierto es_ES
dc.description.bibliographicCitation P, S.; Bakshi, S.; T.n.c, A. (2017). Breakup length on Urea Water Solution jet in hot cross flow. En Ilass Europe. 28th european conference on Liquid Atomization and Spray Systems. Editorial Universitat Politècnica de València. 838-845. https://doi.org/10.4995/ILASS2017.2017.4982 es_ES
dc.description.accrualMethod OCS es_ES
dc.relation.conferencename ILASS2017 - 28th European Conference on Liquid Atomization and Spray Systems es_ES
dc.relation.conferencedate September 06-08,2017 es_ES
dc.relation.conferenceplace Valencia, Spain es_ES
dc.relation.publisherversion http://ocs.editorial.upv.es/index.php/ILASS/ILASS2017/paper/view/4982 es_ES
dc.description.upvformatpinicio 838 es_ES
dc.description.upvformatpfin 845 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.relation.pasarela OCS\4982 es_ES


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