Numerical Investigation On The Blocking Effect Of Special Air Curtain For Spinning Machine

The problem of high energy consumption had become the focus ofspinning industry in the context of practicing the national policy ofEnergy Conservation and Emission Reduction. The CFD technology andexperiment was adopted as research methods to solve the problem of highenergy consumption and pollutants distribution under currentair-conditioning mode—direct air conditioning system in the productionprocess. The CFD steady-state models of workshop,air curtain andspinning machine were established to analyze the force and the airdistribution in front of the pull window of spinning machines. Also thepartition effect of the air curtain was studied in detail. Finally, the best airsupply velocity,slits width,the angle of air supply were obtained bycomparing measured air temperature in spinning machines andcontaminant concentration outside machines with simulated one. Fromthe study, we provided the foundation for improving the ventilation andair-conditioning modes of spinning machine shops and made the adoptionof craft air conditioning for spinning machines and comfort airconditioning for workshops possible, leading to significant energy saving.The research briefs were:1. By analyzing the air distribution of the specific air curtain ofspinning machines under different air supply velocity, we obtained thatthe air supply velocity at 4m/s and 4.5m/s can guarantee the temperatureinside spinning machines within the range of required temperature andensure external air will not flow into machines under the condition of100mm for the slid width and 0°for the air supply angle.2. Provided that the temperature in the machine met the requirement,we changed the slid width to 150mm and kept the air supply angle as 0°.We found that 3m/s for air the supply velocity was better than 2.67m/s.3. Kept the slid width as 150mm , the air supply velocity as 3m/s.We concluded from the simulation that 5°for the air supply angle canensure the temperature in the machine within the required range and block the circulation between machine's inside and outside air other than10°.