狭长空间强扰动条件下热环境控制的数值模拟

Thermal Environment Simulation of Narrow Tunnel Space with Several Symmetric Air Disturbance inside

本文针对一单侧开口，内部存在两股对称高温高速热射流且伴随多股扰动气流的狭长空间，采用全面纵向通风技术进行热环境控制、排除热污染。经数值模拟方法，得到了经济有效的全面通风临界断面风速为2．6m／s。另外，为改善局部有人区域及敏感壁面的温度，在热射流出口前端4m处设置射流风机，进行助推诱导，使排风温度提高约10～20K，提升了纵向通风的排热效果；并改善了相关人员呼吸区的温度场，使其平均温度下降约10K。

One-side opening narrow tunnel space with several symmetric air disturbance inside was heated by a pair of hot jet with high speed inside. The comprehensive longitudinal ventilation technology was adopted to control the thermal pollution. The results of the numerical simulation shows that a cost-effective general ventilation critical section wind speed was 2.6m/s. Additionally, in order to reduce the temperature of some zones where people stay or which are thermal sensitive, a pair of jet fans are set at the front of the hot jet exit for pushing hot airflow back. As a result, the exhausted air temperature increased by about 10-20 K, enhancing the effect of longitudinal ventilation for exhausting heat; and the temperature field of relevant personnel breathing zone gets better with average temperature drops of about 10K. Multi-jet wind simulation results show that with effective from an economic perspective, the jet velocity should be set to 20m/s.