At present, it is highly required from the automobile sector to develop clean technologies with lower fuel consumption for ambient air quality improvement, green house gas reduction and energy security. Furthermore, due to continuously stringent emission legislation and the fast depletion of the primary energy resources, the development of new highly efficient and environment friendly combustio...

http://dx.doi.org/10.1016/j.apt.2015.03.013 0921-8831/ 2015 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved. ⇑ Corresponding authors at: Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA. Tel.: +1 574 631 9825 574 631 8366 (A.S. Mukasyan), Surface Engineering...

In the present work, we illustrate the process of constructing a simplified model for complex multi-scale combustion systems. To this end, reduced models of homogeneous ideal gas mixtures of methane and air are first obtained by the novel relaxation redistribution method, and thereafter used for the extraction of all the missing variables in a reactive flow simulation with a global reaction model.

The process of combustion in a closed system, such as a cylinder in a piston engine, is executed in three steps: (1) ignition, devoid of any pressure change; (2) the dynamic stage, manifested by distinct pressure rise; and (3) decay, associated with pressure drop. This paper is concerned solely with the second step, exhibiting the dynamic behavior of the system. The effectiveness of the exother...

Introduction This research is directed at the development and application of a new class of optical sensors, based on absorption of light from tunable diode lasers, which enable in situ measurements of temperature and gaseous composition, in real time and in a variety of research-oriented and practical energy-conversion systems. These sensors have significant potential to enable exploratory res...

Poor sanitation is one of the major hindrances to the global sustainable development goals. The Reinvent the Toilet Challenge of the Bill and Melinda Gates Foundation is set to develop affordable, next-generation sanitary systems that can ensure safe treatment and wide accessibility without compromise on sustainable use of natural resources and the environment. Energy recovery from human excret...

Continuous combustion processes are prominently encountered in many applications related to power generation, heating and propulsion. Examples include domestic and industrial burners, steam and gas turbines, waste generators, and jet and ramjet engines. Continuous combustion processes exhibit a wide range of dynamics. Of these, conditions which promote coupling with the acoustic field and resul...

Abstract The High Dimensional Model Representation (HDMR) method has been applied in several previous studies to obtain global sensitivity indices of uncorrelated model parameters in combustion systems. The method is based on a decomposition of the model output in terms of a hierarchy of cooperative effects among the model inputs, which is unique when the input parameters are independent. Howev...

Turbulent multi-phase combustion is encountered in a number of engineering applications, such as internal combustion engines and gas-turbine aircraft engines. Therefore, the ability to perform accurate numerical simulations of these systems is of paramount importance to improve their design and efficiency. However, the underlying physics of spray combustion are extremely complicated. The liquid...

New challenge in combustion is the extended use of “clean” fuels, such as methane, in “particle free” combustion devices. Although large efforts have been made, actual combustion systems burning methane are still source of particulate that might be emitted in the atmosphere. In this paper measurements of ultrafine particle emission from premixed laboratory flames and several practical combustio...