Effect of Airflow Field in the Tangential-Longitudinal Flow Threshing and Cleaning System on Harvesting Performance

Table 1

Four-factor and four-level test plan.

	Fan speed (m·s^−1)	Angle of air distributor (°)	Chaffer opening (mm)	Speed of tangential (longitudinal) flow drum (m·s^−1)
1	1500	24	26	620 (580)
2	1200	28	26	720 (674)
3	1500	28	22	770 (720)
4	1500	22	20	720 (674)
5	1200	24	22	670 (627)
6	1200	26	20	620 (580)
7	1400	24	20	770 (720)
8	1200	22	24	770 (720)
9	1500	26	24	670 (627)
10	1300	24	24	720 (674)
11	1400	26	22	720 (674)
12	1400	28	24	620 (580)
13	1400	22	26	670 (627)
14	1300	26	26	770 (720)
15	1300	28	20	670 (627)
16	1300	22	22	620 (580)