The Effects of Spray Parameters on the Flame and Spray Characteristics for Liquid Fuel Spray Flame

액체연료 의 분사연소시 분사조건 이 화염 과 액적군 의 성질 에 미치는 영향

In order to examine the effect of initial spray condition on the spray combustion mode and flame characteristics, theoretical analysis was carried out to predict combustion mode and flame structure for various initial distribution of droplets in spray. A system of conservation equations of spray flame in two dimensional axisymmetric for two phase flow was solved by a discrete element method for n-Butylbenzen (C$_{10}$ $H_{14}$). As a results of present study, there are two principal group combustion modes that may occur independently for various initial group combustion numbers in a spray burner. These group combustion modes are termed as an external and internal group combustion mode. The critical group combustion number between the internal and external group combustion mode and the flame characteristics of those flame are also predicted. These results may be used as a basic data in the designing of new combustors as well as proper operating conditions for spray burners.s.

본 연구는 Kim과 Chiu가 사용한 연속체 관점에서 유도된 액체-기체상의 2상유 동모델(Two Phase Flow:TPF)을 이용하여 초기 집단연소수(group combustion number)의 크기, 즉 액적들의 초기 분포상태에 따른 연소상태를 예측 분류한다. 또한 이때 예 측된 대표적인 연소상태에서 형성되는 화염의 성질을 비교 검토한다.