Application to Combustion Stabilization Control by Development of Swirl Vane Angle Time Variable Combustor

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K04215
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 19020:Thermal engineering-related
• Research Institution: Gifu University
• Principal Investigator: Komiyama Masaharu 岐阜大学, 工学部, 教授 (40178372)
• Co-Investigator(Kenkyū-buntansha): 西田 哲 岐阜大学, 大学院工学研究科, 准教授 (30377783)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 予混合火炎 / 旋回羽根 / 時間可変角度 / 燃焼安定化

Outline of Final Research Achievements

In this study, we developed a new swirl vane that can change the vane angle with time and installed the swirl vane in the premixed combustor. Then, the time change performance of the vane angle was clarified. Furthermore, it was shown that the flame tip position formed in the combustor with this variable-vane-angle swirler could be reciprocated continuously in the upstream and downstream directions. At that time, the flow velocity distribution near the flame tip and the flame behavior was measured by the laser image measurements, and both temporal change characteristics were clarified. Furthermore, a high-speed camera was introduced into this system to determine the flame tip position, and a flame tip position stabilization system was constructed. And it was shown that it is possible to stabilize the flashback of the flame induced in the circular tube with swirling flow and keep the flame tip position within a specific range.

Free Research Field

燃焼工学

Academic Significance and Societal Importance of the Research Achievements

本研究では，燃焼負荷（空気比および総流量）一定の下で，旋回流強さのみを変化させる時間可変旋回羽根を開発し，予混合気燃焼器を模擬した円筒型燃焼管内で形成する予混合火炎の位置を連続的に上流および下流方向へ往復移動可能であること初めて示した報告例である．また，構築した火炎位置安定化システムを適用することで，一度逆火を開始した予混合火炎先端位置を旋回流強さのみを制御することで，一定範囲内に保持することが可能であることを示したものである．このことは，今後高度化するとともに，逆火防止の方策が難しくなる，ガスタービン燃焼器をはじめとする大型燃焼器での安定燃焼実現のために寄与するものと考えられる．