静电过滤器减少灰扩散到发动机的分析

A Zare Shahneh
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引用次数: 0

摘要

2010年3月至6月期间,冰岛Eyjafjallajökull的一系列火山事件对整个西欧的航空旅行造成了巨大的干扰。中断始于2010年4月的最初六天。大约20个国家对商业飞机关闭了领空,影响了大约1000万旅客。火山灰已经导致许多飞机停飞,因为它可能会损坏飞机引擎。在本研究中,针对高涵道比涡扇发动机PW4000,设计了电除尘器(ESP)技术策略。它基于标准的两级ESP,但采用PW4000发动机设计。创新的ESP原型主要由六个放电极板和三个圆形收集电极环组成的六角结构组成。通过计算流体设计(CFD)进行了气动验证。它建造了一个20米长的风洞,并将带有ESP的发动机放在风洞的中心。在模拟中,使用离散相模型(DPM)创建了一个充满颗粒的大气,以复制火山灰注入清洁空气。从结果来看,它在发动机进气附近有明显的空气动力学影响,尽管影响很小,并且在发动机风扇之后可能被忽略。另外,在20000v电压下进行了CFD静电验证,电势轮廓分布完美,说明该ESP配置设计能够充分给出电场。因此,新的ESP布局的模拟结果可以得出结论,即静电过滤器能够在具有高气动性能的发动机中减少火山灰的进气量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of electrostatic filter to mitigate ash diffusion into engine
Between March and June 2010 a series of volcanic events at Eyjafjallajökull in Iceland caused enormous disruption to air travel across Western Europe. The disruptions started over an initial period of six days in April 2010. About 20 countries closed their airspace to commercial jet traffic and it affected approximately 10 million travelers. Volcanic ash has been caused grounding of many aircraft as a source of possible damage to aircraft engines. The projected technical strategy, an electrostatic precipitator (ESP), was tailored for the high bypass turbofan engine model PW4000 in this study. It was based on the standard two-stage ESP but designed with the PW4000 engine. The innovative ESP prototype is primarily made up of a hexagram structure of six discharge electrode plates and three circular collecting electrode rings. An aerodynamic verification was conducted through computational fluid design (CFD). It built a 20-meter wind tunnel and placed the engine with ESP in the centre of it. A particle-laden atmosphere was created in the simulation using a discrete phase model (DPM) to replicate volcanic ash injection into clean air. From the results, it has a clear aerodynamic impact near the engine's intake, although the effect is small and may be ignored after the engine fans. Additionally, a CFD electrostatic verification was generated with a voltage of 20000 V, and the contour of the electric potential is perfect distributed, suggesting that an electric field can be adequately given by this ESP configuration design. Therefore, the simulation results of the new ESP layout would have allowed drawing conclusions about the electrostatic filter's ability to reduce volcanic ash intake in an engine with high aerodynamic performance.
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