Thermal Characteristics of a Stratospheric Airship with Natural Convection and External Forced Convection

Table 1

Empirical equations for natural convection heat transfer.

Proposed by	Geometry model	Empirical equation
Eckert and Jackson [9]	Vertical flat panel		(i)
Bayley [10]	Vertical flat panel		(ii)
Clark [11]	Horizontal flat panel		(iii)
Carlson and Horn [13]	Interior of sphere		(iv)
Rohsenow [12]	Horizontal flat panel		(v)