To reduce the temperature we must supply the coolant to the grinding area. But the air-flow field makes much fluid not entrance the grinding area.
因为,在磨削过程中,工件的表面会产生大量的热量,为了抑制工件表面的温升,就必须向磨削区供应充分的冷却液,然而由于磨削区空气场的存在,实际上有大量的冷却液不能进入磨削区。
参考来源 - 磨削区空气场的有限元分析及仿真·2,447,543篇论文数据,部分数据来源于NoteExpress
美国和墨西哥边境一带的空气质量也受到墨西哥北部一场大规模野火所产生烟雾的影响。
The air quality along the U.S.-Mexico border was affected by smoke coming from a large wildfire in Mexico's northern state of Coahuila.
此外,高温、无风的气象条件非常给力,似乎有意要在美国东部成全一场经典的空气污染事件。
On top of that, weather conditions—high temperatures, calm winds—were just right for a classic summer pollution event in the East.
据悉,这也是入冬以来最强的一场冷空气。
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