numerical simulation of twin impinging jets in tandem...

Lift fan

Intake duct

Engine

Roll nozzles

Warm air

Rear exhaust nozzle

Hot exhaust

Cold air

Impingementregion

Wall jetregion

76

7

4233247

1

57

1

Transmitting/receivingoptics

Bragg cellPhoto

multiplier

Opticalfibers

Dataanalysis

- r

T T T

∂ ∂ ∂ ∂ ∂ + µ + µ µ ∂ ∂ ∂ ∂ ∂

Optical

Impinging jets

North wall

Lateral wallPlane of

symmetry

South wall

(a) (b)

(c)

(d) (e)

Ground vortex

20

15

10

5

0

Y/D

-30 -20 -10 0 10 20 30

X/D

0-0.225-0.45-0.675-0.9

v

20

15

10

5

0

Y/D

-30 -20 -10 0 10 20 30

X/D

0-0.225-0.45-0.675-0.9

v

20

15

10

5

0

Y/D

-30 -20 -10 0 10 20 30

X/D

0-0.225-0.45-0.675-0.9

v

20

15

10

5

0

Y/D

X/D

-10 0 10

(a) (b)

(c) (d)

20

15

10

5

0

Y/D

20

15

10

5

0Y

/D

20

15

10

5

0

Y/D

X/D

-10 0 10

20

15[

10

5

0

Y/D

-30 -20 -10 0 10 20 30

X/D

0-0.225-0.45-0.675-0.9

v

20

15

10

5

0

Y/D

-30 -20 -10 0 10 20 30

X/D

0-0.225-0.45-0.675-0.9

v

Y/D

Y/D

20

15

10

5

0

-10 -5 0 5 10

Z/D

0.0750.0700.0600

0.075

0

0.0700.0600.0550.030

0.075

0

0.0700.0600.0550.030

0.0600.0550.0400

(a) (b)

(d)(c)

20

15

10

5

0

Y/D

20

15

10

5

0

20

15

10

5

0

Y/D

-10 -5 0 5 10

Z/D

Umean/Vj Umean/Vj

Umean/Vj Umean/Vj

0.075

0

0.0700.0600.0550.030

0.0750.070.060

0.0600.0550.0400

0.075

0

0.0700.0600.0550.030

20

15

10

5

0

Y/D

(a) (b)

(d)(c)

-10 -5 0 5 10

Z/D

20

15

10

5

0

Y/D

20

15

10

5

0

Y/D

20

15

10

5

0

Y/D

-10 -5 0 5 10

Z/D

Umean/VjUmean/Vj

Umean/Vj Umean/Vj