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¡¾Ó¢ÎÄƪÃû¡¿ Characteristics of airflow in underfloor air supply plenum ¡¾ÏÂÔØƵ´Î¡¿ ¡î ¡¾×÷Õß¡¿ ÀîС»ª; ¹¨¸£»ª; ¡¾Ó¢ÎÄ×÷Õß¡¿ Li Xiaohua and Gong Fuhua Hunan Institute of Engineering; Xiangtan; Hunan Province; China; ¡¾×÷Õßµ¥Î»¡¿ ºþÄϹ¤³ÌѧԺ; ¡¾ÎÄÏ׳ö´¦¡¿ ůͨ¿Õµ÷ , Heating Ventilating nbsp; ÆÚ¿¯ÈÙÓþ£ºÖÐÎĺËÐÄÆÚ¿¯ÒªÄ¿×ÜÀÀ ASPTÀ´Ô´¿¯ ÖйúÆÚ¿¯·½Õó CJFDÊÕ¼¿¯ ¡¾ÖÐÎĹؼü´Ê¡¿ ¾²Ñ¹²ã; ¾Ö²¿×èÁ¦ÏµÊý; Á÷¶¯ÌØÐÔ; ¡¾Ó¢ÎĹؼü´Ê¡¿ underfloor plenum; local resistance coefficient; flow characteristic; ¡¾ÕªÒª¡¿ ͨ¹ýʵÑé²âÊÔºÍCFDÄ£Äâ,Ñо¿Á˵ذ徲ѹ²ãÄÚÓÐÒ»¸ùºáÁºÊ±,¾²Ñ¹²ãÄÚµÄÆøÁ÷Á÷¶¯ÌØÐÔ¼°¾Ö²¿×èÁ¦ÏµÊýµÄÀíÂÛ¼ÆËãʽ¡£Ñо¿½á¹û±íÃ÷,ºáÁº¸ßÓ뾲ѹ²ã¸ßÖ®±ÈΪ0.3¡«0.7,¾²Ñ¹²ãÄÚËÙ¶ÈΪ0.2¡«1.0m/s,ReΪ4.08103¡«2.04104ʱ,¾Ö²¿×èÁ¦µÄÀíÂÛ¼ÆËãÖµÓëʵ²âÖµ·Ç³£½Ó½ü,¸ÃÀíÂÛ¼ÆËãʽ¿ÉÓÃÓÚ¼ÆËã¾Ö²¿×èÁ¦ÏµÊý¡£ ¡¾Ó¢ÎÄÕªÒª¡¿ Based on the experiments and CFD simulation,studies the airflow characteristics in underfloor plenum and deduces the calculation formula of the local resistance coefficient when there is one beam crossed to the airflow direction in underfloor plenum.As a result,the calculation values of local resistance agrees well with experimental ones under the condition of the ratio of beam height to plenum height in the range of 0.30.7,air velocity in underfloor plenum 0.21.0 metre per second and Reynolds number 4 0802...
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