Countercurrent cooling of blown film

Automation Control for Blown Film Line

Blown Film Extrusion is the primary technology used to make plastic films especially for the packaging industry. Its machines produce protective films used in many industries including food and pharmaceuticals – that extend product shelf life and improve consumer appeal. Products such as trash bags, frozen food packaging, shrink wrap, stretch film labeling, form, fill and seal packaging, medica...

Film Cooling Measurements for Novel Hole Configurations

The effect of film cooling slot exit area and shape is studied. Detailed heat transfer coefficient and film effectiveness measurements are obtained simultaneously using a single transient IR thermography technique. Two designs with a crescent shaped exit and a slot exit are considered. The results show that the crescent shaped exit provides significantly higher film cooling effectiveness than t...

Endwall Film-Cooling in Axial Flow Turbines

Evolution Strategies for Film Cooling Optimization

References 1Al Taweel, A. M., and Landau, J., “Turbulence Modulation in TwoPhase Jets,” International Journal of Multiphase Flow, Vol. 3, No. 2, 1977, pp. 341–351. 2Gore, R. A., and Crowe, C. T., “Effects of Particle Size on Modulating Turbulent Intensity,” International Journal of Multiphase Flow, Vol. 15, No. 2, 1989, pp. 279–285. 3Schreck, S., andKleis, S. J., “ModiŽ cationofGrid-GeneratedTu...

The influence of bubble mechanics on some properties of blown film

A series of experimental runs were carried out on a small blown film line to investigate the effect of processing parameters on the mechanical properties of the film that was produced. Three different dies were used and for each die the throughput (mass flow rate), freeze line height and blow-up ratio were varied, with take-up velocity adjusted to give a fixed nominal gauge (film thickness). On...