Design of refractory metal life test heat pipe and calorimeter

Original publisher: Huntsville, Ala. : National Aeronautics and Space Administration, Marshall Space Flight Center , [2010] OCLC Number: (OCoLC)700247191 Excerpt: ... NOMENCLATURE A channel dimension; area A surface area calorimeter shell outer wall diameter c A coolant flow area f A surface area inner wall i A surface area outer wall o C impurity concentration C specific heat p CTE coefficient of thermal expansion D initial diameter i d heat pipe diameter d calorimeter channel wall inner diameter ci d calorimeter channel wall outer diameter co d hydraulic diameter h d inner diameter i d outer diameter o d calorimeter shell wall inner diameter si f friction factor f material fraction of complete recrystallization R g acceleration due to gravity h convective heat transfer coefficient xiii