Metodologia para análise do coeficiente de transferência de calor em superfícies corrugadas sob jatos incidentes

• Autor(a) principal: Alencastro, Jocarli Itamirã Duarte
• Data de Publicação: 2015
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da PUC_RS
• Texto Completo: http://tede2.pucrs.br/tede2/handle/tede/7096
• topic: POLIURETANOS; POLÍMEROS; CALOR - TRANSFERÊNCIA; ENGENHARIA DE MATERIAIS; ENGENHARIAS

The purpose of this work is the development of a methodology to determining the heat transfer coefficient by forced convection in the form of incidents jets heated in corrugated surfaces sheets of rigid polyurethane foam with the possibility of quantifying the transmitted heat. They were prepared six different geometry but with the same ridge width and height. At the same time we designed a structure for conducting experiments with a hot air circulation condition with temperature and speed controlled air and other cold air circulation condition with controlled temperature. Using hot air by forced convection of the surface profiles of selected plates were analyzed by sensors and thermography. It was considered steady and heat transfer in one-dimensional direction for the study, monitoring of trials was conducted by supervisory program with reading temperature measurements every second and final storage of 14,400 points, a total of four hours for each test. With the simulation and experimental data from automated thermographic images information and this methodology can determine roughly the convection coefficient and Nusselt correlations and for different Reynolds corrugated plates for five variations in hot air inlet speed.