农机化研究
農機化研究
농궤화연구
Journal of Agricultural Mechanization Research
2016年
7期
90-94
,共5页
林德志%吴努%陆永光%游兆延%徐弘博%胡志超
林德誌%吳努%陸永光%遊兆延%徐弘博%鬍誌超
림덕지%오노%륙영광%유조연%서홍박%호지초
全秸秆覆盖%免耕播种机%叶片式抛送装置%数值模拟
全秸稈覆蓋%免耕播種機%葉片式拋送裝置%數值模擬
전갈간복개%면경파충궤%협편식포송장치%수치모의
whole stalk cover%no-till planter%impeller blower%numerical simulation
为了揭示全秸秆覆盖地免耕播种机中叶片式抛送装置流场分布情况及出料直管处气流速度的影响因素,应用FLUENT 软件对抛送装置进行了数值模拟,在原模型的基础上,对不同的叶片数、叶片直径、叶片倾角和叶轮转速进行对比模拟. 模拟结果表明:壳体内气流速度沿叶轮径向方向由内向外逐渐升高,圆形壳体出料口处左侧的气流速度较右侧高;4 叶片内部速度矢量及A 截面的气流速度分布较叶片数3 和5 均匀;抛送叶轮转速越高、叶片直径越大,A截面气流速度越高;叶片后倾10°,更有利于秸秆物料抛送.
為瞭揭示全秸稈覆蓋地免耕播種機中葉片式拋送裝置流場分佈情況及齣料直管處氣流速度的影響因素,應用FLUENT 軟件對拋送裝置進行瞭數值模擬,在原模型的基礎上,對不同的葉片數、葉片直徑、葉片傾角和葉輪轉速進行對比模擬. 模擬結果錶明:殼體內氣流速度沿葉輪徑嚮方嚮由內嚮外逐漸升高,圓形殼體齣料口處左側的氣流速度較右側高;4 葉片內部速度矢量及A 截麵的氣流速度分佈較葉片數3 和5 均勻;拋送葉輪轉速越高、葉片直徑越大,A截麵氣流速度越高;葉片後傾10°,更有利于秸稈物料拋送.
위료게시전갈간복개지면경파충궤중협편식포송장치류장분포정황급출료직관처기류속도적영향인소,응용FLUENT 연건대포송장치진행료수치모의,재원모형적기출상,대불동적협편수、협편직경、협편경각화협륜전속진행대비모의. 모의결과표명:각체내기류속도연협륜경향방향유내향외축점승고,원형각체출료구처좌측적기류속도교우측고;4 협편내부속도시량급A 절면적기류속도분포교협편수3 화5 균균;포송협륜전속월고、협편직경월대,A절면기류속도월고;협편후경10°,경유리우갈간물료포송.
Impeller blower had been simulated with FLUENT to reveal the distribution of fluid field and the influence fac -tors of air velocity on straight pipe of the impeller blower in the straw mulching no-till planter, and some contrast simula-tions of different blade number, blade diameter, blade tilt angle and rotational speed had been did on the basis of the o-riginal model.The results showed that the air velocity of inner-shell increased along the radial direction of the impeller and the air velocity of the left side was higher than the right side on the circular shell discharging mouth ;The internal ve-locity vector and the air velocity of a section of 4 blades were more uniformity than 3 blades and 5 blades;The air velocity of a section was higher when the rotational speed of the impeller was higher and the blade diameter was larger and it is more conductive to toss straw material when the blade angle was caster angle 10 °.