Fundamental combustion experiment of single-point auto-ignition engine with pulsed supermulti-jets, single piston and rotary valve

Yoshiki Kobayashi, Ken Naitoh, Yuichi Onuma, Soichi Ohara, Daisuke Arai, Yutaka Machida, Yuuki Isshiki, Hajime Ito, Yusuke Tada, Takahiro Suzuki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A new compressive combustion principle due to colliding pulsed supermulti-jets has been proposed by us, which is expected to achieve high thermal efficiency over 50% and less combustion noise. This paper reports some combustion experiments for a new prototype engine based on this breakthrough principle, which has twenty-four intake nozzles for supermulti-jets (Tri-octagon). First, after a rotary valve induces twenty-four intake jet flows simultaneously at a negative pressure condition generated during the early expansion process of a single piston, collision of jet flows at the center of combustion chamber occurs, which results in high local compression ratio at the center and also single-point auto-ignition. Combustion experiments for this prototype engine at lean burning condition reliably show higher combustion pressure than flame propagation on chamber wall.

Original languageEnglish
Title of host publication2018 Joint Propulsion Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105708
DOIs
Publication statusPublished - 2018 Jan 1
Event54th AIAA/SAE/ASEE Joint Propulsion Conference, 2018 - Cincinnati, United States
Duration: 2018 Jul 92018 Jul 11

Publication series

Name2018 Joint Propulsion Conference

Conference

Conference54th AIAA/SAE/ASEE Joint Propulsion Conference, 2018
CountryUnited States
CityCincinnati
Period18/7/918/7/11

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ASJC Scopus subject areas

  • Aerospace Engineering
  • Control and Systems Engineering

Cite this

Kobayashi, Y., Naitoh, K., Onuma, Y., Ohara, S., Arai, D., Machida, Y., Isshiki, Y., Ito, H., Tada, Y., & Suzuki, T. (2018). Fundamental combustion experiment of single-point auto-ignition engine with pulsed supermulti-jets, single piston and rotary valve. In 2018 Joint Propulsion Conference [AIAA 2018-4629] (2018 Joint Propulsion Conference). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2018-4629