Unsteady Three-Dimensional Computational Experiments of the Single-Point Auto-Ignition Engine Based on Semispherical Supermulti-Jets Colliding with Pulse for Automobiles

Ken Naitoh*, Kan Yamagishi, Shouhei Nonaka, Takuma Okamoto, Yoshiaki Tanaka

*この研究の対応する著者

研究成果: Conference article査読

13 被引用数 (Scopus)

抄録

Supercomputer simulations substantiate a high potential of the new compressive combustion principle based on supermulti-jets colliding with pulse, which was previously proposed by us and can maintain high compression ratio for various air-fuel ratios. An original governing equation extended from the stochastic Navier-Stokes equation lying between the Boltzmann and Langevin equations is proposed and the numerical methodology based on the multi-level formulation proposed previously by us is included. For capturing instability phenomena, this approach is better than direct numerical simulation (DNS) and large eddy simulation (LES). A simple two-step chemical reaction model modified for gasoline is used. A small engine having a semispherical distribution of seventeen jets pulsed is examined here. Pulse can be generated by a rotary plate valve, while a piston of a short stroke of about 65mm is also included. Computations from 2,000 rpm to 20,000rpm at some loads for the present engine having supermulti-jets colliding with pulse and conventional super- or turbo-charged system are done, which show a high thermal efficiency over 60%, because there is very less heat loss on combustion chamber and piston surface. Emphasis is also placed on the fact that, in this new engine (Fugine), higher compression results in less combustion noise.

本文言語English
ジャーナルSAE Technical Papers
2014-October
DOI
出版ステータスPublished - 2014 10月 13
イベントSAE 2014 International Powertrains, Fuels and Lubricants Meeting, FFL 2014 - Birmingham, United Kingdom
継続期間: 2014 10月 202014 10月 22

ASJC Scopus subject areas

  • 自動車工学
  • 安全性、リスク、信頼性、品質管理
  • 汚染
  • 産業および生産工学

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