Cross, Split

Properties: adiabatic, not isentropic, directional, inlet based restrictor

This is an element, in which a gas mass flow is split into three separate branches.(See Fig.) It is characterized by the following constants (to be specified in that order on the line beneath the *FLUID SECTION, TYPE=CROSS SPLIT card):

• label of the element defined as branch 0.
• label of the element defined as branch 1.
• label of the element defined as branch 2.
• label of the element defined as branch 3.
• cross section A_0 of branch 0, whereas A_1=A_0
• cross section A_2 of branch 2, whereas A_3=A_2
• angle \alpha_1=90^\circ.
• angle \alpha_2=90^\circ.
• hydraulic diameter d_{h0}=d_{h1}
• hydraulic diameter d_{h2}=d_{h3}
• \zeta-correction factor k_1 for the main passage ( \zeta_{eff} = k_1\zeta)
• \zeta-correction factor k_2 for the branches ( \zeta_{eff} = k_2\zeta)

Figure: Geometry of a flow splitting cross