【摘 要】
：
The matching method of turbofan engines is becoming increasing complicated because it is a problem with multiple targets and multiple variables.Therefore,a suitable matching method is required for the
【机 构】
：
AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai,China
论文部分内容阅读
The matching method of turbofan engines is becoming increasing complicated because it is a problem with multiple targets and multiple variables.Therefore,a suitable matching method is required for the overall performance scheme design.In this paper,based on an axial flow compressor characteristic,a flow characteristic model is proposed to represent the pitch line of the axial flow compressor.Based on the flow characteristic model,a performance index function with weighted factors is built to determine the matching characteristic of the fan,booster and compressor.The component characteristics are select according to the cycle parameter selection results,and a component matching method is achieved with the consideration of turbofan engine typical operating conditions.The simulated results show that the weighted specific fuel consumption can be reduced.The specific fuel consumption of turbofan engines can be decreased with the use of matching method.The operating points of typical conditions would locate in the relatively high efficiency zone of the fan,booster and compressor respectively.
其他文献
本文在参考电站风机试验导则的基础上,总结了一套能在短时间内准确测量空冷风机风量的现场测试方法,并结合自主研发的空冷风机在线压力监测装置,对空冷风机的实际运行工况进行了现场试验评估.试验结果表明,利用本文提出的空冷风机风量测量方法可以准确的反映出空冷风机的实际工作风量,同时风机的压力监测数据也验证了不同位置空冷风机系统阻力的变化规律.
采用S-A模型对一台2.5级低速轴流压气机及经过锯齿尾缘改型的两种压气机进行了数值模拟,详细比较了近失速、最高效率、大流量三类工况下的压气机性能.结果表明:锯齿静子可以拓宽压气机的稳定裕度.在近失速工况下,压气机性能得到提高,而其他工况则为整体的下降,其中机匣处有半锯齿的改型带来的恶化更加严重.进一步研究表明:不同的机匣锯齿布置会对压气机性能造成显著的影响,其中机匣处有锯齿的改型明显地改善了第一级
In this paper,a correlation model between centrifugal compressor and its piping system is built based on plenum chamber model and throttle valve model.This model could be used to conduct numerical ana
Enhancing stall margin has a great importance for the development of turbo compressors.The application of circumferential grooved casing treatment(CGCT)is a useful method of increasing the stable oper
Most established flow simulation tools,although constantly being perfected to compute the flow accurately,are inherently incapable of predicting the regime the flow being simulated is operating in.One
Influence coefficient method has long been used for both numerical and experimental flutter investigation.In an experimental investigation,quite often a linear cascade or an annular cascade sector wit
本文针对火焰清理机大宽高比喷口自由剪切湍流外流场进行数值模拟,研究不同宽高比矩形喷口可压缩射流近场流场和远场噪声特性.射流流场结构利用大涡模拟(LES)湍流模型,成功预测近场流场结构特征,声场利用FW-H积分方程进行计算.由于其出口为亚音速射流,本文采用可压缩模型,粘性利用Sutherland理论.模拟结果与同尺度烧嘴模型对比,吻合较好.计算结果表明,随着长宽比的增加,流场向下游发展,射流会进入自
The time spectral method(TSM)is a very effective method for analyzing temporally periodic flows.By replacing the time derivative term with the time spectral source term,the unsteady equations are tran
A domain scaled turbine stage model is proposed to simulate the unsteady flow of the first stage of E3 gas turbine.The paper focused on the moving path of the stator passage vortex near hub endwall th
To learn the vibration characteristic is the key factor for mistunned bladed disk system with nonlinear dry friction damping structures.Present works devote to establishing nonlinear friction contact