Flame–spray interaction and combustion features in split-injection spray flames under diesel engine-like conditions
نویسندگان
چکیده
منابع مشابه
PDF-based simulations of turbulent spray combustion in a constant-volume chamber under diesel-engine-like conditions
Transported probability density function (PDF) methods are used to account for turbulent fluctuations in composition and temperature in simulations of liquid fuel injection (n-heptane), vaporization, mixing, autoignition, combustion and soot formation for a constant-volume combustion chamber. Both stochastic Lagrangian particle and stochastic Eulerian field methods are used to solve the modeled...
متن کاملConditional Moment Closure Modeling of Turbulent Spray Combustion in a Direct Injection Diesel Engine
which are in a nonconservative form. Global conservation is not guaranteed if integration is performed for Eqs. (2) and (3), which do not include PDF inside the temporal and spatial derivatives. On the other hand nonconservative forms allow a relatively coarse mesh since conditional averages show much less spatial dependence than PDF weighted Favre averages. Here η ρ ρ η ≡ and the scalar dissip...
متن کاملPrediction of Physical Delay Period RiDirect Injection Diesel Engine Combustion
A semi-empirical mathematical model for predicting the physical part of ignition delay period in the combustion of diesel engines with swirl is developed. This model is based on a single droplet evaporation model. The governing equations, namely, equations of droplet motion, heat and mass transfer were solved simultaneously using a Runge-Kutta step by step method. The computation was executed u...
متن کاملThree-Dimensional Modeling of Combustion Process, Soot and NOx formation In a Direct-injection Diesel Engine
This paper is presented to study the combustion process and emissions in a direct injection diesel engine. Computations are carried out using a three-dimensional model for flows, sprays, combustion and emissions in Diesel engines. Interactions between combustion and emissions with flow field are considered and it is shown that soot mass fraction increases at regions with low turbulence inten...
متن کاملEffects of Direct Water Injection on DI Diesel Engine Combustion
The effects of in-cylinder water injection on a direct injection (DI) Diesel engine were studied using a computational fluid dynamics (CFD) program based on the Kiva-3v code. The spray model is validated against experimental bomb data with good agreement for vapor penetration as a function of time. It was found that liquid penetration increased approximately 35% with 23% of the fuel volume repl...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Combustion and Flame
سال: 2019
ISSN: 0010-2180
DOI: 10.1016/j.combustflame.2019.08.031