该分析涵盖了气流干扰对位于HVAC系统中风道弯头配件下游的测量和控制设备的影响。计算流体力学（CFD）研究将测量和控制设备分为可安装在扰动气流区域内的设备和可安装在下游但远离扰动气流区域的设备；最终提高系统整体性能，节约能源。方法:使用CFD软件对风管弯头配件下游的气流流线进行建模和研究。 其目的是研究典型的加热、通风和空调（HVAC）仪表和控制装置在风管弯头配件下游的最佳位置。考虑了典型的室内空气管道速度。结果:由CFD软件生成的数据被制成表格，并得到CFD图形图的支持。讨论内容包括典型的HVAC风道仪表和控制装置。结论:CFD分析表明，通过考虑风道弯头配件下游的气流速度流线和压力流线，可以优化典型仪表和控制装置的性能。 引文:ASHRAE交易——第120卷第2部分，华盛顿州西雅图

This analysis covers the effect of airflow disturbances on measurement and control equipment positioned downstream of an air duct elbow fitting in an HVAC system. The computational fluid dynamics (CFD) research separates measurement and control equipment into what can be installed within the disturbed airflow region and what can be installed downstream but away from the disturbed airflow region; ultimately, improving the overall system performance and saving energy. Methodology: a CFD software was used to model and investigate the airflow streamlines downstreamandthe air duct elbow fitting. The aim being to investigate the optimal positioning of typical heating, ventilating, and air-conditioning (HVAC) instrumentation and control devices downstream of an air duct elbow fitting.Typical in buildingsHVACair duct velocities were considered. Results: generated by the CFD software were tabulated and supported by CFD graphical plots. Discussions were included covering typical HVAC air duct instrumentation and control devices.Conclusion:theCFDanalysisshowedhowtheperformance of typical instrumentation and control devices can be optimized by considering airflow velocity stream lines and pressure stream lines developed downstream of an air duct elbow fitting.