Experimental Investigation on the Performance of Desuperheater in Power Plant
Desuperheater is an important equipment in power plant. In desuperheater, spray nozzle is the key component forits advantages of full contact and seldom blockage. In this study, a nozzle atomization test system is built and different nozzle water total pressures and wind speeds are chosen under the condition of Room-temperature to test the atomization characteristics of the target spray nozzle in high-speed airflow. The experimental results are compared with the theoretical results. The conclusion shows the SMD distribution range after second atomization at We ranging from 20 to 50. Under the laboratory conditions, when the nozzle exit caliber is 3mm and impingement angle is 60¡ã, it can be seen that the SMD reaches its minimum value under the certain water pressure. This study provides a useful reference for the target spray nozzle atomization technology.
Formation of thin flat sheets of water
A thin plane sheet of fluid which is limited laterally and converges towards a point transforms itself into a sheet which diverges in a perpendicular plane. When the angle of convergence is small and the distribution of thickness in the converging sheet is elliptic the diverging sheet has the same shape as the converging sheet. Apparatus for producing such a sheet was set up and the shape of the stream and distribution of pressure in the region of the transformation were measured and compared with calculations.
Laminar heat or mass transfer in rectangular channels and in cylindrical tubes for fully developed flow: comparison of solutions obtained for various boundary conditions
Abstract A comparison is made of results obtained with various boundary conditions at the wall of the channels. By comparing blood Sherwood numbers for finite wall resistance with those for constant concentration boundary condition only a small variation is found for various points along the blood channel.