Study of Transient Phenomena in a Small-Scale Hazardous Waste Incinerator

该项目的目的是：(1)研究导致危险废物不完全燃烧的瞬态现象。(2)评估焚烧炉尺寸（成本）与可靠性之间的关系，并确定可能限制小型系统中废物最终破坏程度的化学和流体力学现象。(3)评估在小型焚烧炉开发中使用高体积热释放率航空航天技术，包括如何使用燃烧声学来改善和/或监测焚烧炉的性能。上述目标将通过实验和数值模拟的综合方案来解决。实验设计遵循燃烧流体中的瞬时速度、温度和羟基自由基浓度场，从中可以计算出焚烧的三个T（停留时间、温度和湍流强度或混合）。实验结果将用于基于守恒方程的守恒形式的数值解的二维瞬态燃烧模型的开发。将使用真实的化学和传输，能够准确地表示火焰与燃烧室中发现的大型旋涡结构的相互作用。预计研究结果将有助于开发小型、可靠的焚化炉，这些焚化炉可在小型废物产生厂现场有效使用。

The objectives of this project are the following: (1) To investigate transient phenomena which lead to incomplete combustion of hazardous wastes. (2) To assess the relationship between incinerator size (cost) and reliability, and to identify the chemical and fluid mechanical phenomena which may limit the ultimate degree of waste destruction in small systems. (3) To evaluate the use of high volumetric heat release rate aerospace technology in the development of small incinerators, including how combustion acoustics might be used to improve and/or monitor incinerator performance. The objectives above are to be addressed by means of an integrated program of experiments and numerical simulations. The experiments are designed to follow the instantaneous velocity, temperature and hydroxyl radical concentration fields in the combusting fluid, from which the three T's of incineration (residence time, temperature, and turbulence intensity or mixing) can be calculated. Experimental results are to be used in the development of a 2-D transient combustion model based on the numerical solution of the conservative form of the conservation equations. Realistic chemistry and transport, capable of accurately representing the interaction of the flame with large scale vortical structures found in the combustor, are to be used. The results are expected to contribute to the development of small, reliable incinerators which can be used effectively on the site of small waste generators.