Temperature Field and Optimal Design of Duct-Ventilated Tower Foundation in Permafrost Regions

Table 1

Numerical simulation cases.

Case	D (m)	D (cm)	H (m)	Adjustable shutter
C 1	0	0	0	No
C 2	4	8	−4.7	No
C 3	4	12	−4.7	No
C 4	4	16	−4.7	No
C 5	4	20	−4.7	No
C 6	4	20	−4.5	No
C 7	4	20	−4.3	No
C 8	4.5	20	−4.7	No
C 9	5	20	−4.7	No
C 10	4	20	−4.7	Yes

Note. D: diameter of the duct-ventilated tower foundation; d: diameter of the ventilation duct; H: buried depth of the duct-ventilated tower foundation.