Under higher vacuum(0.05 MPa) condition,for larger Re number(34755),the overall coefficients of ion implanted tube tube bundles are about 1.43 times those of the common ones,and the condensation heat-transfer coefficient around 2 times.
After the tilt angle of the pipe bundle increase 1 degree, and when the damp ball temperature of inlet air increases 2°C, the differences in temperature are approximately equal.
The parameters of evaporative air cooler, such as the medium flux of pipe, inlet temperature, inlet air temperature, area of heat exchange, tilt angle of pipe bundle etc. , all have an impact on the cooling effect, and however, no research on this has been reported.
In order to find out the relation about flux, temperature and tilt angle of pipe bundle with the effect of cooling of evaporative air cooler, above all the calculation program has been compiled according to the design principle of evaporative air cooler in this dissertation, and the experiment equipment of water-saving type of evaporative air cooler is also designed and made.
Detailed parametric study of three-dimensional gas-particle multiphase flow characteristics in U-beam tube bundle inertial separators was conducted by numerical simulation.
The chromatographic bed is arranged in a series of interconnected vertical columns and is rotated whilst one end of the tube bundle is closed by a stationary plate through which liquids enter and leave the bed.
Results are presented of an investigation of heat transfer in a longitudinal blow of air over a staggered tube bundle with s/d=1.2 and with heating and cooling in the range Re=2 · 103-105.
The main part of the work deals with abstract Higgs bundles; in the last two sections we derive the applications to Higgs bundles valued in a line bundle K and to bundles on elliptic fibrations.
We would like to study triples $(E,L,\phi)$ where $E$ is a vector bundle of rank $r$ over $X$, $L$ is a line bundle over $X$, and $\phi\colon E_\rho\rightarrow L$ is a nontrivial homomorphism.
The results of an experimental study of thermal and aerodynamic characteristics (static pressure, surface friction, and heat transfer) in diverging smooth-tube bundles are presented.
In the present paper the experimental investigations of flow across staggered tube bundles in waste heat boiler are conducted by mans of PIV (Particle Image Velocimetry) system.
The results are shown of an experimental study concerning the improvement of heat transfer by means of circumferential grooves in stranded tube bundles in a parallel stream of water, with the pitch ratio S/D = 1.16, 1.20, 1.34, 1.40, and 1.50.