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
This means that the energy can be transferred between the system and the environment without any degradation, and the processes are reversible – this would be expected in the case of an isentropic process. (b) Non-isentropic expansion If the isentropic efficiency of the turbine is 85%, i.e...
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...
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 ...
(6.29). The blade speed ratio is a function of the inlet enthalpy, pressure ratio, turbine wheel diameter, and rotational speed [23,45]. 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...
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》 ...
4) adiabatic efficiency 绝热效率 1. Anadiabatic efficiencyfunction of the turbine stage was deduced. 针对重型车用、带有调节阀的可调二级增压系统的涡轮级进行了热力学分析,推导了涡轮级绝热效率的计算公式,给出了高、低压涡轮流量和膨胀比的计算方法。
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...
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 ...