نتایج جستجو برای: combustion parameters

تعداد نتایج: 606823  

Journal: :international journal of advanced design and manufacturing technology 0
seyed khatiboleslam sadrnezhaad sharif university of technology shahin katiraei abbas ghasemi

intermetallic phase formation and oxidation reaction during combustion synthesis (cs) of ni-ti equiatomic mixture are affected by mechanical activation (ma) and pre-heating conditions. important parameters are ignition time, reaction duration, temperature rise, microstructural change, titanium oxidation and intermetallic phase formation. superelasticity and shape memory effects are influenced b...

Journal: :Appl. Soft Comput. 2013
Vijay Manikandan Janakiraman XuanLong Nguyen Dennis Assanis

Homogeneous charge compression ignition (HCCI) is a futuristic combustion technology that operates with high efficiency and reduced emissions. HCCI combustion is characterized by complex nonlinear dynamics which necessitates the use of a predictive model in controller design. Developing a physics based model for HCCI involves significant development times and associated costs arising from devel...

2003
H. PITSCH

In the present study, we have formulated the G equation concept for large-eddy simulation (LES) of premixed turbulent combustion. The developed model for the subgrid burning velocity is shown to correctly reflect Damköhler’s limits for largeand small-scale turbulence. From the discussion of the regime diagram for turbulent premixed combustion, it is shown that given a particular configuration o...

1999
S M Sapsford

Computational fluid dynamics (CFD) is being increasingly used to analyse gasoline direct injection (G-DI) combustion systems in the early stages of design and development. Consequently, it is important to ensure that the CFD codes are both fast and accurate. The objective of the work presented in this article was to validate the new, advanced boundary motion capability of VECTIS which is built ...

2016
Ying Gao Bo Yu Ke Wu Qiaoxia Yuan Xianhua Wang Hanping Chen

Effects of the type of biomass and temperature, with longer residence time, on physicochemical characteristics of hydrochar were investigated. Different carbonization conditions were applied with the goal of producing hydrochars having better physicochemical properties. After the carbonization process, the pyrolysis and combustion behaviors of hydrochar were evaluated. The effect of temperature...

2009
V. Mistry

The piston ring assembly is one of the key parts of internal combustion engine. Its performance decides engine power loss to over come friction force and determines the performance of the whole engine. As per the literature review it is reported 40 to 50 % of the total mechanical friction losses in piston ring cylinder wall interface. The present work mainly focused on study of basic tribologic...

2006
Frank Erfurth Mario Hernandez Kelly Tian Dan O’Connor Lee Rosen

With high fuel prices, fuel-savings technologies can provide significant economic benefits to steel mills. Reheating furnaces in integrated and mini-mills consume approximately half of the natural gas used to produce hot-rolled products. Recently, Praxair’s Dilute Oxygen Combustion technology (previously demonstrated for productivity improvements on mini-mill billet reheating furnaces) was exte...

Journal: :Theor. Comput. Sci. 1997
Abdallah El Hamidi Marc Garbey

We consider a three-dimensional thermal-diffusion model for a premixed burner flame. Many experimental and theoretical works in condensed-phase and gas combustion show that the flame front may propagate in a number of different ways. The structure and stability properties of the front depend essentially on the physical parameters of the model. This article describes the use of the symbolic mani...

2000
L. D. Cloutman August Lawrence D. Cloutman

COYOTE and similar combustion programs based on the multicomponent NavierStokes equations require the mixture viscosity, thermal conductivity, and species transport coefficients as input. This report documents a model of these molecular transport coefficients that is simpler than the general theory, but which provides adequate accuracy for many purposes. This model leads to a computationally co...

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