小形ニサイクル火花点火機関における燃焼室内ガス流速のLDA測定 : 第1報, 光ファイバ流速ピックアップの構成と平均流速の測定

フォーマット:

論文

責任表示:

小保方, 富夫 ; 花田, 尚喜 ; 倉林, 俊雄

言語:

日本語

出版情報:

日本機械学会, 1987-04-25

著者名:

• 小保方, 富夫
• 花田, 尚喜
• 倉林, 俊雄

掲載情報:

日本機械学會論文集. B編

ISSN:

0387-5016    

巻:

53

通号:

488

開始ページ:

1496

終了ページ:

1502

バージョン:

VoR

概要:

application/pdf<br />Journal Article<br />To improve the adaptability of LDA (laser Doppler anemometer) for measuring velocities in an engine, an optical fiber system composed of a couple of single mode, polarization-preserving optical fibers has been made to transmit the incident beams. Though the total transmitting efficiency of this optical system is about 24 %, it has been confirmed that a fiber-optic LDA system with a 25 mW He-Ne … laser is applicable to the real-time measurement of gas velocity in the combustion chamber of a small-sized two-stroke spark ignition engine. The ensemble-averaged mean velocities obtained by using this optical system show that the gas velocity rapidly decreases just before the flame front arrival and suddenly increases after passing of the flame. It is also shown that a new bulk flow is generated in the chamber by the gas expansion due to combustion. 続きを見る