Research on the Changing Law of Tunnel Temperature Field and the Application of Air Curtain System in Cold Regions

Figure 19

Velocity vector diagram of different jet angles. (a) Jet angle 20°. (b) Jet angle 25°. (c) Jet angle 30°. (d) Jet angle 35°. (e) Jet angle 40°. (f) Jet angle 45°.

(a)

(b)

(c)

(d)

(e)

(f)