湍流多相混合與氣化反應(yīng)耦合機(jī)理、過程強(qiáng)化及火焰結(jié)構(gòu)特征研究

王輔臣　李偉鋒

摘 要：經(jīng)過該年度的實(shí)施，已完成了研究任務(wù)，上述預(yù)期目標(biāo)均已實(shí)現(xiàn)，主要完成情況如下：（1）調(diào)試、升級(jí)了PIV測(cè)試平臺(tái)，配置了平面激光誘導(dǎo)熒光（PLIF）系統(tǒng)，新購置了PhotronFastcam SA2高分辨率高速相機(jī)。（2）研究了激勵(lì)作用下軸對(duì)稱撞擊流和平面撞擊流的流場(chǎng)形態(tài)及撞擊面振蕩規(guī)律，獲得了激勵(lì)頻率、振幅和噴嘴出口湍流強(qiáng)度對(duì)撞擊面振蕩的影響規(guī)律，研究結(jié)果為湍流撞擊流的混合機(jī)理和強(qiáng)化手段研究提供了參考。（3）利用光場(chǎng)相機(jī)與高溫內(nèi)窺鏡相結(jié)合，結(jié)合數(shù)字圖像處理技術(shù)，對(duì)不同工況下的柴油撞擊火焰高度及脈動(dòng)頻率進(jìn)行研究，建立了多噴嘴對(duì)置式氣化爐內(nèi)火焰三維溫度場(chǎng)，獲得了氣化火焰撞擊高度，為大型氣化爐的安全穩(wěn)定運(yùn)行提供了理論指導(dǎo)。（4）運(yùn)用優(yōu)化的PTV算法，獲得了復(fù)雜對(duì)置撞擊射流中顆粒運(yùn)動(dòng)行為的定量測(cè)量。利用國(guó)家超算中心平臺(tái)，實(shí)現(xiàn)了氣固兩相對(duì)撞流的大規(guī)模直接數(shù)值模擬?；跓崃W(xué)第二定律分析了撞擊流的不同流態(tài)。（5）采用附加邊界應(yīng)力的格子Boltzmann方法（LB-EBF），進(jìn)一步研究了不同顆粒數(shù)目、顆粒流體密度比及顆粒容積率下的慣性顆粒群沉降的運(yùn)動(dòng)規(guī)律，發(fā)展了兩類三維不可壓縮多松弛格子Boltzmann模型，并實(shí)現(xiàn)了單相撞擊流以及運(yùn)動(dòng)顆粒兩相流動(dòng)格子Boltzmann模擬的GPU并行化。

關(guān)鍵詞：湍流多相混合 氣化反應(yīng)機(jī)理 過程強(qiáng)化 火焰結(jié)構(gòu)特征

Abstract：On the basis of the work of the third year， the subject undertaker - the researcher of the East China University of Science and Technology， and Huazhong University of technology centre on the goals around the issue， and give full play to their respective advantages， and work closely to carry out more in-depth research work， and had staged progress and laid a solid foundation for the final completion of the research tasks. In this year， 19 papers were published， of which 11 were indexed by SCI， 18 were indexed by EI， and six patent were applied， and one patent was granted. A second prize of Science and Technology Progress Award of Petrochemical Association and a first prize of the Shanghai Science and Technology Progress Award were obtained. The turbulent multiphase flow system were in-depth studied experimentally， theoretically and numerically， and a breakthrough was achieved in theory revealing the flow stability of turbulent impinging jets， and a number of innovative academic achievement were achieved， and the results have important reference value to the multi-nozzle gasifier design and optimization.

Key Words：Turbulent multiphase mixing；Gasification reaction mechanism；Process intensification；Structural characteristics of the flame

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