Probabilistic modeling of forced ignition of alternative jet fuels

نویسندگان

چکیده

Fast and reliable high altitude re-ignition is a critical requirement for the development of alternative jet fuels (AJFs). To achieve stable combustion, spark kernel needs to transit in partially or fully extinguished flow develop flame front. Understanding relight characteristics AJFs complicated by chaoticity turbulent variations properties. The focus this study prediction such high-fidelity simulations, with specific on fuel composition effect ignition process. For purpose, previously developed computational framework applied, which utilizes LES hybrid tabulation approach modeling forced detailed quantification uncertainty resulting from initial boundary conditions predict probability. method applied two (named C1 C5) Jet-A A2) under gaseous conditions. Results show that mixing fuel–air mixture not affected process, but chemistry effects strongly dominate In particular, exhibits much lower probability than other fuels, especially at lean operating More importantly, behavior contradictory delay experiments longer times C5 compared C1. Comparisons comprehensive captures trends. Analysis trajectories space shows are caused relative mixing, response strain, properties fuel.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Alternative Fuels for Spark Ignition Engines

In order to reduce the atmospheric pollution emitted by automobiles, control devices are being incorporated in the vehicles in many countries. This has resulted in a reduced vehicle mileage to the extent of about fifteen percent. Without the introduction of new technology, any further reduction in emission levels would be expected to extract payment in the form of further fuel economy losses. I...

متن کامل

Oxidation and Ignition Characteristics of Hydrocarbon Fuels

A research program studying the oxidation and ignition characteristics of hydrocarbon fuels has been conducted. The program was initiated in October 1985 with the awarding of a research grant through the Army Research Office (Grant No. DAAG 29-85-K-0253, Project No. 22437-EG) and ran through November 1989. The research program entailed mechanistic studies examining the oxidation chemistry of si...

متن کامل

Study of Volumetric Efficiency for Spark Ignition Engines Using Alternative Fuels

One of the most important parameter for spark ignition engines is volumetric efficiency, as it directly influences specific power output. Several definitions of this parameter are studied from a theoretical point of view, taking into consideration the use of alternative fuels. The influence of using gasoline-bioethanol blends is investigated, as well as the effect of fuelling spark ignition eng...

متن کامل

Modeling the Auto-Ignition of Oxygenated Fuels using a Multistep Model

The research presented here describes the application of a multistep (8-step) autoignition model to oxygenated fuels such as alcohols and esters in a rapid compression machine. This modeling concept is aimed at capturing the ignition behavior of new oxygenated fuel blends, where detailed or reduced chemical kinetics data are not available. The predicted ignition delays from the multistep autoig...

متن کامل

Impact of Non-CO2 Combustion Effects from Aviation on the Environmental Feasibility of Alternative Jet Fuels

....................................................................................................................................................... 2 1 Introduction........................................................................................................................................... 2 2 Methods ........................................................................

متن کامل

ذخیره 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: Proceedings of the Combustion Institute

سال: 2021

ISSN: ['1873-2704', '1540-7489']

DOI: https://doi.org/10.1016/j.proci.2020.06.309