CAJ | 학술논문

气吸式4ZTL-1800割前摘脱稻(麦)联合收获机的吸运风杌的能耗和噪声一般都较大.为了分析气体在风机内的运动规律,应用Fluent软件中的气体运动微分方程及标准的K-ω湍流模型,对吸运风机内气流流场进行了三维数值计算,得到了气体在吸运风机内的流动特征.分析发现气体从叶轮流入到蜗壳时,压力持续上升,由负压转为正压;在靠近叶轮外缘处速度很大,在靠近出口处逐渐降低;在风机后部涡流区面积、涡流强度相对较大.这些特征将为吸运风机的节能降噪设计提供参考依据.
기흡식4ZTL-1800할전적탈도(맥)연합수획궤적흡운풍올적능모화조성일반도교대.위료분석기체재풍궤내적운동규률,응용Fluent연건중적기체운동미분방정급표준적K-ω단류모형,대흡운풍궤내기류류장진행료삼유수치계산,득도료기체재흡운풍궤내적류동특정.분석발현기체종협륜류입도와각시,압력지속상승,유부압전위정압;재고근협륜외연처속도흔대,재고근출구처축점강저;재풍궤후부와류구면적、와류강도상대교대.저사특정장위흡운풍궤적절능강조설계제공삼고의거.
The reduction of the noise and airflow pressure dropped in the fan of 4ZTL-1800 rice combine harvester threshing prior to cutting should be paid attention.In Order to obtain the moving laws of airflow in the fan,the differential equations of airflow moving and standard K-ω turbulent differential equations in the fan were employed to build the numerical simulation of the three dimension airflow in the fan using Fluent software.and the airflow characteristic was analyzed.The results showed that the airflow pressure increased gradually from negative to positive value when airflow moved from the rotor to the volute.And the airflow speed was higher at the edge of rotor far from the axis.and the speed decrease at the exit offan.The area and intensity of airflow turbulent were bigger at the rear ofthe fan,and which resulted in decline of pressure.The numerical calculation results are helpful of the design of fan with low noise.