The Experts below are selected from a list of 75 Experts worldwide ranked by ideXlab platform

H U Zhaoguo - One of the best experts on this subject based on the ideXlab platform.

Hu Zhao-guo - One of the best experts on this subject based on the ideXlab platform.

Huilan Zhou - One of the best experts on this subject based on the ideXlab platform.

  • CCTA (4) - Design of Tread Flange Injection Mold Based on Pro/E
    Computer and Computing Technologies in Agriculture IV, 2010
    Co-Authors: Huilan Zhou
    Abstract:

    In the paper, analyzing the tread flange structure characteristics, its injection mold is designed and the maneuvering tread demolding way is applied to get out flang tread. When designing demolding parts, hydraulic pressure motor and chain-gear mechanism are used. Besides, Parting Plane and the forming parts can be gained automatically in Pro/E(Pro/Engineer Wildfire3.0) and standard moldbase can be achieved by EMX4.1 including gating, cooling, and guiding system, etc. The designing ways and structure is proved rational and can be taken as reference for the similar injection mold especially for those with longer tread.

Wan Jinjin - One of the best experts on this subject based on the ideXlab platform.

V. M. K. Sastri - One of the best experts on this subject based on the ideXlab platform.

  • Estimation of convective heat transfer coefficients in industrial steam turbines
    Journal of Pressure Vessel Technology-transactions of The Asme, 1996
    Co-Authors: N. Adinarayana, V. M. K. Sastri
    Abstract:

    Steam turbines are increasingly being used in industries for duties other than base load operations, where fast start-ups, rapid load changes, and frequent shutdowns are involved. Generally, industrial steam turbines operate with constant inlet steam parameters and are partial admission turbines having the first turbine stage as an impulse stage and the subsequent turbine stages as reaction stages on drum-type rotors. During start-up, as control valves open, steam is admitted and passes through impulse blading, wheel chamber, and through the subsequent reaction stages. The turbine outer casing is horizontally split and the Parting Plane flanges have relatively thick sections. To limit thermal stresses which arise due to temperature differences in outer casings and rotors, the steam flow has to be increased gradually. The rate at which the steam flow is to be increased depends on the efficiency of heat transfer, i.e., the heat transfer coefficient, and hence knowledge of inside heat transfer coefficient is essential. The high heat transfer coefficients, h, at the beginning of cold start are attributable to condensation of steam at initial stages. The value of h decreased with lapse of time, and also its variation reduced considerably over time. Further, the h value varies more with more » location rather than with lapse of time. The variations observed in h show the complexity of heat transfer process and also bring out the fact that semi-empirical formulas, such as Gazley`s (1958), are not accurate for application in steam turbines. More studies need to be conducted on models of steam turbines to generate adequate data based on which a new correlation for the heat transfer coefficient h for start-up phase of operation could be proposed. « less