• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>EAEC European automotive congress >EXPERIMENTAL STUDY OF THE SURGE BEHAVIOUR OF A CENTRIFUGAL COMPRESSOR
【24h】

EXPERIMENTAL STUDY OF THE SURGE BEHAVIOUR OF A CENTRIFUGAL COMPRESSOR

机译：离心式压缩机浪涌行为的实验研究

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Turbo charging is a way for car manufacturers to meet the major challenge of fuel economyand reduction of the CO_2 emissions. The aim is to replace current engines with a downsized engine in order to improve its fuel consumption. This requires higher specific power and torque especially at very low engine speed. The wide functioning area required for this technique leads to an operation of compressors at low air flow rate and high compression ratio characterised by the occurrence of surge phenomenon. On the engine, it can be intensified by the fuel flow rate pulses consecutive to air flow rate pulses leading to torque oscillations. In fact, surge is an aerodynamic instability that affects both the compressor and its associated network which results in strong pressure and mass flow rate oscillations describing a surge cycle in the compressor map. The surge limit of a centrifugal compressor and its frequency are highly dependant on the geometrical configuration of its associated network. In this paper, the experimental work was focused on the study of the surge behaviour of a centrifugal compressor by means of a turbocharger test bench and the influence of the upstream and downstream circuit (volumes sizes and pipes lengths) and their interaction at the surge limit, the frequency and the unsteady fluctuations amplitude of this phenomenon. A comparative study of our experimental results with the Greitzer model was also done in terms of surge frequency and intensity prediction.
机译：涡轮增压是汽车制造商，以满足燃料economyand减少CO_2排放的重大挑战的方式。其目的是为了提高其燃油消耗与小型化发动机，以取代目前的引擎。这需要较高的比功率和扭矩尤其是在非常低的发动机转速。需要这种技术导致压缩机的操作在低空气流量和高压缩比，其特征在于的浪涌现象的发生的广泛起作用的区域。在发动机上，可以通过连续的空气流率的脉冲导致转矩振荡的燃料流率脉冲来加强。事实上，浪涌是影响这两个结果在描述压缩机图喘振循环强压力和质量流率的振荡的压缩机及其相关的网络的空气动力学不稳定性。离心式压缩机，它的频率的喘振极限高度依赖于它的相关联的网络的几何结构。在本文中，实验工作是由涡轮增压器试验台装置和上游和下游电路的影响（体积尺寸和管道的长度），并在喘振极限及其相互作用集中在离心压缩机的喘振特性的研究的频率和上述非稳态波动幅度的这种现象。我们与Greitzer模型实验结果的比较研究也在激增频率和强度预测方面做了。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号