The use of a plasma jet for flame stabilization and promotion of combustion in supersonic air flows

Computational Simulation of Scramjet Combustors - A Comparison between Quasi-One Dimensional and 2-D Numerical Simulations

“…Kimura, et al [75], performed feasibility study on the use of plasma jet in supersonic air streams for stabilizing flame and promoting combustion of fuel jet. The conclusions were drawn that the performance of plasma jet is dependent upon its position [75].…”

“…The conclusions were drawn that the performance of plasma jet is dependent upon its position [75]. The feedstock gases used are hydrogen and nitrogen, where nitrogen proves superior based on the input of electrical power required [75].…”

Pulsed Combustion of Hydrocarbon Fuels in a Supersonic Model Combustor

“…[1][2][3] The region for stable combustion of hydrocarbon fuels is limited by relatively long ignition delay time compared to the resident time. The stability limits could be extended by reducing the reaction time through the use of continuous heat addition such as fuels partially cracking, 4, 5 pilot hydrogen, 6,7 or plasma jet 8 This work has two main objectives: 1) to examine the possibilities of hydrocarbon fuels combustion using pulsed ignition sources with flow or fuel conditions beyond the limits of stable combustion; 2) to explore the potential combustion modes of hydrocarbon fuels. Ethylene and supercritical kerosene are selected as the test fuels due to their potential applications in Scramjet propulsion.…”

An Experimental Approach using Plasma Jets to Realize the Radicals' Effects for Improving Ignition and Combustion

“…Numerous studies using plasma jets for promoting combustion have been conducted, but most target selecting the best performance conditions for a given practical situation, such as a given flow Mach number and pressure in an ignition experiment to develop a supersonic ramjet (SCRAM) engine. [3][4][5][6][7][8] The objective of this study is to propose and design an experimental apparatus with a plasma torch capable of investigating the effectiveness of radicals for premixed gas combustion at relatively low speeds, with which the roles of different radicals in combustion can be compared in as general manner as possible. The effectiveness of radicals was evaluated from the input electrical power necessary for the limits of ignition and combustion sustenance using this original apparatus throughout the study.…”

“…By Yohji YAMAMOTO, 1) Takashi IWAMOTO, 2) Kiyotaka SHUZENJI, 3) Akira KAKAMI 2) and Takeshi TACHIBANA To introduce an alternative fuel to a combustion system or develop a more sophisticated system used in aeronautical and other engineering fields, the combustion characteristics of the fuel must be fully understood. Therefore, some effects of radical species, which are involved and play a significant role in the combustion process, must be understood to arrive at a new technology, such as for super-lean combustion or low-quality fuel utilization, which in turn would lead to solutions for recent energy issues.…”