• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ASME(American Society of Mechanical Engineers) Turbo Expo vol.3; 20070514-17; Montreal(CA) >Performance of a Pulse Detonation Combustor-Based Hybrid Engine
【24h】

Performance of a Pulse Detonation Combustor-Based Hybrid Engine

机译：基于脉冲爆燃燃烧器的混合动力发动机的性能

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A key concept envisioned for Pulse Detonation Engine (PDE) technology is a hybrid engine, where a Pulse Detonation Combustor (PDC) replaces the combustor in a conventional gas turbine. A systems level performance estimation model for a PDC-based hybrid engine cycle was presented. A variable property formulation was used to estimate the cycle performance parameters namely the thermal efficiency (η_(th)) and the net specific work (W_(net)). Performance estimations were obtained using a one-step finite-rate chemistry to simulate reactions, and the frozen reactions assumption to model the products of combustion. Two specific parametric studies are performed in which the compression ratio (CR) and the purge fraction (pf) were systematically varied. The predicted variations of η_(th) and W_(net) with varying compression ratio and purge fraction are in agreement with the trends reported in the literature. For a range of values of CR (1-40), performance (η_(th)) advantage of a PDC-based hybrid engine is predicted, when compared to a conventional gas turbine engine. The present calculations show that the assumed unsteady turbine component efficiency (η_T) for the case of a PDC-based hybrid engine has a large effect on η_(th). An experimental study investigating the operation of a multi-tube PDC-turbine hybrid system was performed to understand the effect of unsteady flows entering the turbine on the turbine component performance (η_T). An eight-tube PDC can-annular configuration was integrated with a single-stage axial turbine nominally rated for 10 lbm/s, 25000 RPM and 1000 hp. The system accumulated a total of 144 minutes of operation with long duration runs of approximately 5 minutes, in order for the rig to achieve thermal steady state and for the turbine to attain constant speed. The turbine component efficiency was found to be similar under PDC-fired operation and steady flow operation within the uncertainty of the measurement.
机译：混合动力发动机是脉冲爆震发动机（PDE）技术所设想的一个关键概念，其中脉冲爆震燃烧器（PDC）取代了传统燃气轮机中的燃烧器。提出了基于PDC的混合发动机循环的系统级性能估计模型。使用可变特性公式来估算循环性能参数，即热效率（η_（th））和净比功（W_（net））。使用一步有限速率化学方法模拟反应，并使用冻结反应假设来模拟燃烧产物，从而获得性能估算。进行了两个特定的参数研究，其中系统地改变了压缩比（CR）和吹扫分数（pf）。随压缩比和吹扫分数的变化，η_（th）和W_（net）的预测变化与文献报道的趋势一致。对于一定范围的CR（1-40），与传统的燃气涡轮发动机相比，可以预测基于PDC的混合动力发动机的性能（η_（th））优势。当前的计算表明，对于基于PDC的混合动力发动机，假设的非定常涡轮效率（η_T）对η_（th）的影响很大。进行了一项研究多管PDC涡轮混合系统运行的实验研究，以了解进入涡轮的非恒定流对涡轮部件性能（η_T）的影响。八管PDC罐状环形结构与单级轴流涡轮机集成在一起，额定功率为10 lbm / s，25000 RPM和1000 hp。该系统总共运行了144分钟，大约5分钟的长时间运行，以使钻机达到热稳定状态并使涡轮机达到恒定速度。在测量的不确定性范围内，发现在PDC燃烧运行和稳定流动运行下，涡轮部件效率相似。

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