爆轟波三波點擦除煙跡表面積碳機制

趙煥娟; John H. S. Lee; 張英華; 嚴屹然

doi:10.13374/j.issn2095-9389.2017.03.003

爆轟波三波點擦除煙跡表面積碳機制

doi: 10.13374/j.issn2095-9389.2017.03.003

1) 北京科技大學土木與資源工程學院, 北京 100083
2) Mechanical Engineering Department, McGill University, Montreal, Quebec, Canada H3A 2K6

基金項目:

國家自然科學基金資助項目（E041003）；中央高校基本科研業務費專項資金資助項目（FRF-TP-15-105A1）；中國博士后科學基金資助項目（2015M580049）

詳細信息

中圖分類號: TD77⁺4;O381
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出版歷程
- 收稿日期: 2016-05-16

Precise mechanism of triple point passage removing soot on soot-coated surface

1) School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) Mechanical Engineering Department, McGill University, Montreal, Quebec, Canada H3A 2K6

摘要

摘要: 為理解三波點在壁面及端面積碳留下記錄的確切機制，推動對螺旋爆轟內部結構的研究，采用端面煙熏玻璃與內壁煙膜結合的實驗方法記錄胞格結構，并得到不穩定、較穩定及穩定預混氣的側壁及端面爆轟記錄.2H₂+O₂+3Ar給出了清晰精細的端面結果，其單頭螺旋結果表明相對于結果近似的側壁結果，內部螺旋結構并非固定.進而從附著碳粒的粒度尺寸分析出碳跡附著原理并結合五種預混氣的反應特性，確定鍵能足以克服碳跡吸附在表面的力時才能擦除煙跡.另外預混氣中的碳分子也會導致煙跡堆積而影響端面結果，反射激波的強度也影響記錄的清晰度.最終確定煙跡擦除機制受預混氣影響，應針對預混氣選用表面粗糙度載體和積碳顆粒尺寸，并給出了記錄爆轟結構的方法.
- 螺旋爆轟 /
- 煙膜 /
- 煙熏玻璃 /
- 三波點 /
- 胞格結構
Abstract: To understand the precise mechanism by what the soot is removed when the triple point passed over the smoked inner wall foil or smoked end-on glass and promote the research on spinning detonation structure, smoked end-on glasses and inner wall smoked foils were established to record the trajectories of triple-shock Mach intersections of spinning detonation. Detonation records of unstable, a little stable and very stable premixed mixtures were obtained in wall foils and end-on glasses. Smoked end-on glass of 2H₂ + O₂ + 3Ar gave clear records. Sing-head spinning detonation records of 2H₂ + O₂ + 3Ar indicates that the internal structure of the spinning detonation is not stable while the inner wall results are similar. The cause why soot can be adsorbed on foils and glasses is one factor. Another factor is that reaction characteristics performance of different mixtures should be considered according to above experimental results. The soot can be removed when bond energy is bigger than adsorption energy between the soot and the foil or glass surface. What's more, the carbon molecules particles in detonation front reaction may lead to carbon accumulation and affect the records. In another hand, the strength of reflected shock wave may affect the clarity of the records. Finally, the precise mechanism is affected by characteristics of mixtures. Using appropriate surface roughness and soot particle size according to mixtures characteristics can give satisfying detonation structure records.
- spinning detonation /
- smoked foils /
- smoked end-on glass /
- triple point /
- cellular structure

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參考文獻(18)

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