Control of ThermoAcoustic Phenomena with Applications to Novel Energy Conversion Devices

热声现象的控制及其在新型能量转换装置中的应用

• 批准号: 1363386
• 负责人: Bassam Bamieh
• 金额: $ 30万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-08-01 至 2018-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1363386&HistoricalAwards=false
• 关键词: Control; ThermoAcoustic; Phenomena; Applications; Novel

Thermoacoustic energy conversion devices are engines and refrigerators in which mechanical work is done by intense, contained pressure waves rather than the traditional pistons, cranks or turbine mechanisms present in traditional engines and refrigerators. These devices have almost no moving parts, thus minimizing mechanical friction losses and leading to potentially higher efficiencies than traditional ones. This award supports research leading to new types of thermoacoustic devices in which active control enables the optimization of thermodynamic cycles and adaptation to rapidly varying loading and operating conditions. These smart thermoacoustic devices are integrated with control electronics, thus transferring complexity from mechanical design into the design of the control algorithm, where it can be much more easily implemented. They are particularly suited to unpredictable and time-varying settings such as those that harness waste heat or small-scale solar-thermal power. The control design techniques investigated in this project include (a) optimal design of periodic operating trajectories of thermoacoustic systems using the techniques of Optimal Periodic Control (OPC) as well as frequency domain methods, (b) the design of feedback for regulation of periodic distributed systems around spatio-temporal limit cycles, and (c) the investigation of the limits of performance in the control of thermoacoustic systems with point versus distributed sensing. Aside from their direct relevance to thermoacoutic systems, these research topics are important in a wide class of spatially distributed dynamical systems that occur in flow and gas dynamics, flexible structures and other domains. Another significant component in the proposed research program is the experimental investigation of control design concepts in several thermoacoustic devices including new varieties of Rijke and Sondhauss tubes, as well as thermoacoustic engines and heat pumps.

热声能量转换装置是发动机和冰箱，其中机械功是通过强烈的、封闭的压力波完成的，而不是传统发动机和冰箱中存在的传统活塞、曲柄或涡轮机构。这些设备几乎没有移动部件，因此可以最大限度地减少机械摩擦损失，并可能比传统设备提高效率。该奖项支持新型热声装置的研究，其中主动控制能够优化热力学循环并适应快速变化的负载和操作条件。这些智能热声设备与控制电子设备集成，从而将复杂性从机械设计转移到控制算法的设计中，从而更容易实现。它们特别适合不可预测和随时间变化的环境，例如利用废热或小型太阳能热能的环境。该项目研究的控制设计技术包括（a）使用最佳周期控制（OPC）技术和频域方法对热声系统的周期性运行轨迹进行优化设计，（b）围绕时空极限环调节周期性分布式系统的反馈设计，以及（c）研究点与分布式传感控制热声系统的性能极限。除了与热声系统直接相关之外，这些研究主题在流动和气体动力学、柔性结构和其他领域中发生的各种空间分布动力系统中也很重要。拟议研究计划的另一个重要组成部分是对几种热声装置的控制设计概念进行实验研究，包括新型 Rijke 和 Sondhauss 管以及热声发动机和热泵。