|
|
large eddy simulation of gdi single-hole and multi-hole injector sprays with comparison of numerical break-up models and coefficients
|
|
|
|
|
نویسنده
|
zamani hamed ,hosseini vahid ,afshin hossein ,allocca luigi ,baloo mahdi
|
منبع
|
journal of applied fluid mechanics - 2016 - دوره : 9 - شماره : 2 - صفحه:1013 -1022
|
چکیده
|
In the present study the fuel spray of a gasoline direct injected engine with multi-hole injector is simulated.simulation inputs data, injection flow rate and spray cone angle are obtained from previous experimentalstudies. log-normal distribution with different standard deviation is used for initial droplet size as the primarybreak-up model in order to reach the agreement between experimental and calculated spray tip penetration. as the first step, only one plume of spray injected into a quiescent air environment is simulated and validated by varying break-up model and standard deviation. then, with coefficient obtained from the single jet simulation all six spray jets are simulated based on the injector nozzles geometry. the comparison between single-jet simulation and multi-jet simulation shows that validated model coefficients for the single-jet spray cannot be used for multi-jet spray simulation without significant modifications due to adjacent jet interaction and pressure drag. a set of new coefficients for the multi-jet spray is presented
|
کلیدواژه
|
gasoline direct injection (gdi) engine; single-hole and multi-hole spray; spray tip penetration; largeeddy simulation.
|
آدرس
|
sharif university of technology, center of excellence in energy conversion, mechanical engineering department, ایران, sharif university of technology, center of excellence in energy conversion, mechanical engineering department, ایران, sharif university of technology, center of excellence in energy conversion, mechanical engineering department, ایران, istitutomotori cnr, italy, irankhodro powertrain company (ipco), ایران
|
پست الکترونیکی
|
m_baloo@ip-co.com
|
|
|
|
|
|
|
|
|
|
|
|
Authors
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|