Crypto-steady supersonic pressure exchange : A simple analytical model
Crypto-steady supersonic pressure exchange : A simple analytical model
复制标题
DOI：
10.1016/j.apenergy.2007.06.010
复制
发表时间：
2008
期刊：
影响因子：
11.2
通讯作者：
Hongfang Zhang;C. Garris
中科院分区：
文献类型：
--
作者：
Hongfang Zhang;C. Garris
本文的动机是开发一种新型涡轮机，其中通过超声波结构创建的流体叶轮取代机械叶轮。本文是一项探索性研究，旨在展示超声波结构如何有效地实现这一目标，并提供一些有关其行为的基本见解。在基本层面上，对从机械涡轮机械到直接导流诱导装置（包括稳流喷射器、波转子和压力交换装置）的范围进行了比较。虽然作者一直在研究各种流动诱导装置，旨在找到实际的解决方案，但流动相互作用的细节却被几何形状和复杂的相互作用所掩盖。本文试图退后一步，研究最简单的可想象模型，该模型演示了被认为是新技术关键的现象。该模型是在超音速无摩擦半无限平板后面发生的隐稳态超音速压力交换过程，板两侧之间存在压差。研究发现，即使存在超音速流动结构，也可以实现非常高的压缩机效率和能量传递率。由于效率高，分析表明，有潜力开发新一代直流感应装置，它比传统涡轮机械更简单、更紧凑，但比传统喷射器和波转子更高效。提供的基本信息将有助于在实际的密码稳定导流装置中利用超音速压力交换。
This paper is motivated by a long-range goal of developing a new class of turbomachine where fluid impellers, created through supersonic wave structures, replace mechanical impellers. This paper is an exploratory study to show how effectively supersonic wave structures can fulfill this goal, and to provide some fundamental insight as to the behavior. A comparison, at a fundamental level, of the spectrum of flow induction devices from mechanical turbomachinery to direct flow induction including steady flow ejectors, wave rotors, and pressure exchange devices is explored. While the authors have been studying various flow induction devices intended to lead to practical solutions, the details of the flow interactions are obscured by geometries and the complex interactions. This paper attempts to take a step backward and look at the simplest conceivable model that demonstrates the phenomena thought to be the key to a new technology. This model is a crypto-steady supersonic pressure exchange process occurring behind a supersonic frictionless semi-infinite flat plate having a pressure differential between both sides of the plate. It is found that very high compressor efficiencies and energy transfer rates are possible even with the presence of supersonic flow structure. Because of the high efficiencies, the analysis shows that there is a potential for the development of a new generation of direct flow induction devices far simpler and more compact than conventional turbomachinery, yet far more efficient than conventional ejectors and wave rotors. Fundamental information is provided which will facilitate exploiting supersonic pressure exchange in practical crypto-steady flow induction devices.