基于ICEM建模Fluent数值模拟地下车库通风安全设计

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摘要：随着我国国民经济的快速发展，人们生活水平的不断提高，汽车已经成为了主流的交通工具。在土地资源日趋紧张的大中城市，停车的问题日益凸显，由于地下车库不占用地上空间，所以地下车库备受人们青睐。 42854

由于地下车库与地上车库相比有其特殊结构特点使得汽车产生的有害物难以排出，通风换气的能力差，所以人们对地下车库的空气品质尤为担心。为了保证地下车库内良好的空气品质并尽量的节约能源，需要确定合理的通风形式以及通风系统的控制形式。

计算流体力学在近年来被广泛用于通风系统的研究中。本文采用流体动力学CFD模拟软件，数值模拟的方法，为研究合适的通风机布置对室内通风效果，考虑到检验地下车库内产生的有害气体散发量不确定、机械通风由风机自由控制风量风压、局部排风满足不了排风要求、且自然通风湿度温度不稳定，本设计采用全面通风和机械补风相结合得形式，排除在地下车库中车辆启动和运行时排放的废气中的有毒物质，像这样来维持地下车库内空气品质。

建立好地下车库模型后，使用FLUENT模拟软件，对地下车库室内空气流动情况和污染物浓度场分布进行数值模拟分析，并提出不同数量不同型号风机在通风系统中的可行性，以达到改善室内空气环境和实现通风系统节能的目的。本次设计中，结合并总结借鉴国内外相关案例的基础上，通过比较地下车库室内污染物浓度场、室内空气速度流线图、室内空气流线图变化，研究并选择了在不同通风机布置下的最佳方案。并结合实际工程需要，对存有问题提出建议与意见。

毕业论文关键词：地下车库；通风；数值模拟；Fluent

Ventilation safety design of Underground Garage Based on ICEM modeling Fluent numerical simulation

Abstract: With the rapid development of China's national economy, the continuous improvement of living standards, cars have become the mainstream of transportation. Parking in the large and medium cities of the growing scarcity of land resources, the problem of growing, because do not take up space on the ground, underground garage and underground garage people's favor.

Due to the underground garage in comparison with the ground garage has its special structure makes it hard for cars produced by pests, ventilation ability is poor, so the air quality of underground garage are particularly worried about. In order to guarantee the good air quality in the underground garage and try to save energy, you need to determine a reasonable form of ventilation and ventilation system control form.

Computational fluid dynamics in recent years has been widely used in ventilation system of the research. In this paper, the fluid dynamics CFD simulation software, numerical simulation method, to study the right fan arrangement for indoor and ventilated effect, given the test of the formation of harmful gases in the underground garage is sending out uncertainty, mechanical ventilation by free air volume air pressure control, local exhaust fan can't satisfy the exhaust demand, natural ventilation and humidity, temperature is not stable, this design adopts the comprehensive ventilation and mechanical wind combined form, out of the underground garage of vehicle up and running in emissions of toxic substances, like this to keep the air quality in underground garage.

Established model, underground garage on FLUENT simulation software, the underground garage indoor air flow and distribution of the pollutant concentration field numerical simulation analysis, and put forward the feasibility in ventilation system of different number type fan, to improve the indoor air environment and achieves the goal of energy saving ventilation system. In the design, combination and concluded on the basis of related cases at home and abroad for reference, by comparing the indoor pollutant concentration field of underground garage, indoor air velocity flow chart, the indoor air flow chart changes, research and select the best solution under different fan arrangement. And combined with actual project need, put forward Suggestions and opinions to the being problem.