中文摘要：

碰撞射流通风气流以较高速度将热风直接输送到房间下部空间,避免了常规供暖时热空气难以到达人员空间的缺点.以大面积侧窗的高大空间为研究对象,利用数值模拟方法,研究碰撞射流用于高大空间供暖时的热环境特征.结果表明,尽管沿冷表面下沉的冷空气对热射流的运动轨迹有明显影响,但直接到达地面的热射流仍能够克服冷空气的不利作用,消除大空间供暖房间下部温度偏低的缺点.同时研究也表明,碰撞射流热风供暖房间中脚踝部吹风感超出人体舒适范围的风险很大,需要以减小吹风感为目标对送风参数进行优化.

英文摘要：

To avoid the disadvantage of the conventional heating that the warm air is difficult to reach the occupied space,a new systems like impinging jet ventilation systems（IJVS）has been developed which is directly put the air with high momentum downwards onto the floor and spreads over a large area.Based on the large-height space containing a large area of the side windows as the research object,numerical simulation has been used to analyze the indoor thermal environment characteristics when IJV is used in the large space heating.The results show that,although the cold air sinking along the cold surface has a significant effect on the trajectory of the hot jet,the hot jet reaching directly to the ground can still overcome the adverse effects of the cold air,and eliminate the shortcomings that the lower temperature of the low space of the large heating room.The research result also indicates that draught sensation of the ankles have a high risk beyond the range of human comfort.It is necessary to optimize the air parameters to reduce draught sensation.