IEA-Ⅰ型航空植保高速风洞的设计与校测

针对固定翼农用飞机所搭载航空喷头施药雾滴分布研究的需要,该文依照低湍流度风洞设计原理设计了IEA-I型高速风洞。该风洞型式为直流开口式,主要由动力段、过渡段、扩散段、稳定段、收缩段及试验段等部分组成,风洞总体尺寸为9.8 m×1.2 m×1.8m（长×宽×高）;动力段选用离心风机;扩散段为小角度扩散,扩散角5°;稳定段采用六角形蜂窝器和9层阻尼网组合设计;收缩段缩比10.24;试验段截面直径为300 mm。该文采用热线风速仪,皮托管和高速PIV系统测定了风洞试验段气流品质,试验结果表明：试验段风速7.6～98 m/s连续可调,气流紊流度小于1.0%,试验段风场均匀度小于0.4%,平均气流偏角小...

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Bibliographic Details
Published in农业工程学报 Vol. 32; no. 6; pp. 73 - 81
Main Author 唐青 陈立平 张瑞瑞 徐旻 徐刚 张斌
Format Journal Article
LanguageChinese
Published 国家农业智能装备工程技术研究中心,北京100097 2016
农业智能装备技术北京市重点试验室,北京100097%国家农业智能装备工程技术研究中心,北京100097
西北工业大学,西安710068
Subjects
植保
流场
航空
设计
试验
风洞
航空
设计
风洞
流场
试验
design
experiments
wind tunnel
flow field
aerial
植保
plant protection
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ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2016.06.010

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Summary:针对固定翼农用飞机所搭载航空喷头施药雾滴分布研究的需要,该文依照低湍流度风洞设计原理设计了IEA-I型高速风洞。该风洞型式为直流开口式,主要由动力段、过渡段、扩散段、稳定段、收缩段及试验段等部分组成,风洞总体尺寸为9.8 m×1.2 m×1.8m（长×宽×高）;动力段选用离心风机;扩散段为小角度扩散,扩散角5°;稳定段采用六角形蜂窝器和9层阻尼网组合设计;收缩段缩比10.24;试验段截面直径为300 mm。该文采用热线风速仪,皮托管和高速PIV系统测定了风洞试验段气流品质,试验结果表明：试验段风速7.6～98 m/s连续可调,气流紊流度小于1.0%,试验段风场均匀度小于0.4%,平均气流偏角小于0.2°,气流动压稳定系数小于2.0%,归一化轴向静压梯度小于0.02。该风洞能模拟固定翼农用飞行器作业飞行条件,为进一步研究航空喷头的参数优化提供试验平台。
Bibliography:Agricultural aerial spray is one of the most efficient methods for large area plant protection. However, it suffers from the great loss of pesticide droplets, which is caused by the drift. Besides the impact of external environment（wind speed, flight altitude, relative humidity, and so on）, the droplet distribution scope generated by the aerial spray nozzle dominates its drift potential. The high speed wind tunnel becomes one of the most important tools for quantitatively evaluating the aerial spray nozzles, because of its repeatability and stability in providing different test conditions. The IEA-I high speed wind tunnel was designed by the authors to estimate the performance of the aerial spray nozzles mounted on the fixed-wing agricultural aircraft. In order to obtain a good flow quality, a low-turbulence wind tunnel design principle wasused to design this wind tunnel. The IEA-I high speed wind tunnel was built up at the National Engineering Research Center of Intelligent Equipment for Agriculture in Beiji
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2016.06.010