Purpose Usage of gas turbine engines has increased by day due to rising demand for military and civil applications. This case results in investigating diverse topics related to energy efficiency and irreversibility of these systems. The purpose of this paper is to perform a detailed entropy ...
Define isentropic. isentropic synonyms, isentropic pronunciation, isentropic translation, English dictionary definition of isentropic. adj. Without change in entropy; at constant entropy. is′en·tro′pi·cal·ly adv. American Heritage® Dictionary of
The increase of the turbine isentropic efficiency has a greater impact on the increase of the net work per cycle and the thermal efficiency of a Brayton cycle than the same increase of compressor isentropic efficiency. Finally, two goal functions are proposed for thermodynamic optimization of a ...
1.An appropriate front lean Angle increases the range of a centrifugal compressor, improves the flow and enhances the isentropic efficiency. 合适的前倾角有利于扩大压气机工作范围,能够改善流道内的流动,提高等熵效率。 2.The results show that the quasi-isentropic compression experiments in the low press...
According to Guzzella and Onder [47], in automotive applications, typical values for the maximum turbine efficiency are ηt,max≈0.65−0.75. Note that the system mass flow rate is equal to the actual turbine mass flow rate and is calculated with Eq. (6.30) where P7 is in pounds per ...
Using equation (17.64) in conjunction with equation (17.59), the isentropic efficiency of the section may be expressed in terms of enthalpy differences as (17.65)ηs=h2s−h0h2−h0 (This may be contrasted with the inverse formulation used for turbine stage efficiency, equation (15.13).) ...
The influence of the seal water temperature of water ring vacuum bumps on the condenser pressure is analyzed quantitatively,and the relationship between the condenser pressure and the unit efficiency was identified with equivalent enthalpy drop method. 定量分析电厂水环式真空泵密封水温度对凝汽器压力的...
High-speed gas bearings for turbomachinery can dramatically improve the isentropic efficiency of turbine plants. Vibrations, especially low-frequency vibrations caused by the gas-film self-excited vibrations, significantly affect the saf... D Han,J Yang,C Chen,... - 《Journal of Vibroengineering》 ...
Effect of cut-off and compression ratio on the isentropic efficiency during off-design and part-load operations of a Wankel rotary steam expander used for ... Expanding steam from boiler pressure to process pressure using an expansion device instead of a pressure reducing valve is recommended for...
A Strategy for Multi-Point Shape Optimization of Turbine Stages in Three-Dimensional Flow The optimization objective is a weighted sum of individual objectives such as isentropic efficiency, streamwise vorticity and is penalized with a number of ... M Arabnia,W Ghaly 被引量: 18发表: 2009年 A ...