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基于Fluent的固定床生物質(zhì)氣化爐冷態(tài)壓力場(chǎng)研究
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Analysis of Fixed-bed Biomass Gasifier Cold Internal Pressure Field Based on Fluent
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    摘要:

    以下吸式固定床生物質(zhì)氣化爐物理模型為研究對(duì)象,應(yīng)用流體仿真軟件Fluent,對(duì)冷態(tài)氣化爐在單,、雙層氣化劑配風(fēng)工況下的床層壓力場(chǎng)進(jìn)行仿真研究。通過氣化爐多點(diǎn)測(cè)壓實(shí)驗(yàn),對(duì)仿真結(jié)果進(jìn)行驗(yàn)證,。利用歐拉-拉格朗日方法分析氣化爐冷態(tài)流場(chǎng)分布特性,,根據(jù)伯努利方程說(shuō)明氣化爐床層壓力場(chǎng)的變化原因。結(jié)果表明,,仿真與實(shí)驗(yàn)結(jié)果的誤差值在2.5%以內(nèi),,氣化劑配風(fēng)工況的變化改變了爐內(nèi)流場(chǎng),,雙層氣化劑配風(fēng)使氧化層壓力場(chǎng)平均值為14.98kPa,高于單層配風(fēng)工況,,且軸向壓力分布均勻,。

    Abstract:

    Taking the physical model of downdraft biomass gasifier as the research object, fluid simulation software Fluent was used, the pressure field of the gasifier that in the condition of single-layer air-distribution and double-layer air-distribution was comparatively analyzed. By means of multi-point pressure measurement experiment, the simulation results were verified. The Euler-Lagrange model was used to analyze the cold characteristics flow field distribution of gasification. The reason of diversification in pressure field by Bernoulli’s equation was discussed. The results showed that the deviation value of simulation and experimental results was under 2.5%. Different air-distribution condition should lead to the changes of flow field in biomass gasifier. Double-layer air-distribution condition made the average pressure in oxidation area of 14.98kPa, higher than that in the condition of single air-distribution. And also the axial direction pressure distributed equally. 

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孫宏宇,董玉平,周淑霞,董磊,景元琢.基于Fluent的固定床生物質(zhì)氣化爐冷態(tài)壓力場(chǎng)研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2010,41(11):94-97. Analysis of Fixed-bed Biomass Gasifier Cold Internal Pressure Field Based on Fluent[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(11):94-97.

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