Temperature at choke outlet

Input(s)

$T_{u}$: Upstream Temperature (R)

$z_{u}: \quad \mathrm{Z}$ Factor of Upstream Gas Flow (dimensionless)

$z_{o}$: Z Factor of Upstream Gas Flow in Outlet (dimensionless)

k: Specific Heat Ratio (dimensionless)

$P_{o}$: Outlet Pressure (psi)

$P_{u}$: Upstream Pressure at Choke (psi)

Output(s)

$T_{d n}$: Downstream Temperature (R)

Formula(s)

$$ T_{d n}=T_{u} *\left(\frac{z_{u}}{z_{o}}\right) *\left(\frac{P_{o}}{P_{u}}\right)^{\frac{k-1}{k}} $$

Reference(s)

Boyun, G., William, C., \& Ali Ghalambor, G. (2007). Petroleum Production Engineering: A Computer-Assisted Approach, Page: 5/62.