2011Ewade.ppt [Kompatibilit\341si m\363d] - HAW Hamburg

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Balázs GÁTI.: Performace Calculation for UAVs

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Team Project:

• 3-5 Students

• Cooperation

To develop a tool:

• To analyze the performance of a given configuration

Balázs GÁTI.: Performace Calculation for UAVs

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• To analyze the performance of a given configuration

• Compare the performance of configuration candidates

Method:

• Power required (Lifting surfaces + fuselage)

• Power available (Engine + Propeller)

• Analysis of Penauld-diagram

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• High-order panel method (XFoil)

Balázs GÁTI.: Performace Calculation for UAVs

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• High-order panel method (XFoil)

• Lifiting Line Theory,

• Vortex Lattice Method

• 3D Panel Method

• Textfile Output

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Correction of drag:

• kd, Drag Factor

Fuselage effect:

• C , Fuselage Form Drag Factor

Balázs GÁTI.: Performace Calculation for UAVs

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• Cd0_fus, Fuselage Form Drag Factor

• CdS_fus, Fuselage Surface Drag Factor

• ∆z, Thrust Line Offset (trim)

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• Glauert blade element

theory

• Axial and angular

conservation of flow

Balázs GÁTI.: Performace Calculation for UAVs

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conservation of flow

momentum

• D.J. Auld & K.Srinivas

(University of Sidney)

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7000

8000

9000

10000 Thrust available

30

40

50

7000

8000

9000

10000 Prop Efficiency

0.5

0.6

0.7

0.8

Thrust Efficiency

Pro

p. R

PM

[1/s

]

Pro

p. R

PM

[1/s

]

Balázs GÁTI.: Performace Calculation for UAVs

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5 10 15 20 25 30 351000

2000

3000

4000

5000

6000

TAS [m/s]

RP

M [

1/m

in]

-10

0

10

20

5 10 15 20 25 30 351000

2000

3000

4000

5000

6000

TAS [m/s]

RP

M [

1/m

in]

0

0.1

0.2

0.3

0.4

0.5

Pro

p. R

PM

[1/s

]

TAS [m/s]

Pro

p. R

PM

[1/s

]

TAS [m/s]

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Operating RPM is a trade off between propeller and

engine

Engine model:

−⋅=

−−

+

k

RPMRPM

contrengeng ePPmax

1max

η

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Operating Point Calculation:

combination of bisection, secant and inverse

quadratic interpolation methods

Forsythe, G. E., M. A. Malcolm, and C. B. Moler,

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6000Prop RPM

0.83Prop Efficiency

Pro

p. E

ffic

iency

Operating Points for:

•Power Required

•Power Available

Balázs GÁTI.: Performace Calculation for UAVs

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10 12 14 16 18 20 22 24 264200

4400

4600

4800

5000

5200

5400

5600

5800

RP

M [

1/m

in]

Speed (TAS) [m/s] 10 12 14 16 18 20 22 24 260.785

0.79

0.795

0.8

0.805

0.81

0.815

0.82

0.825

TAS [m/s]

Eff

icie

ncy [

%]

Pro

p. R

PM

[1/s

]

Pro

p. E

ffic

iency

TAS [m/s] TAS [m/s]

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0.1

0.1

0.1

0.2

0.2

0.2

0.3

0.3

0.3

0.4

0.4

0.4

0.5

0.5

0.5

0.6

0.6

0.6

0.7

0.7

0.7

0.8

0.8

Prop efficiency

TAS [km/h]

RP

M [

1/m

in]

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4000

6000

8000

10000

50 100 1502000

4000

6000

8000

10000Prop efficiency

TAS [km/h]

RP

M [

1/m

in]

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TAS [km/h] TAS [km/h]

0

1500

Engine BHpower

TAS [km/h]

0

1500

RP

M [

1/m

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50 100 1502000

4000

6000

8000

10000

50 100 1502000

4000

6000

8000

10000Engine BHpower

TAS [km/h]

RP

M [

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300

400

500

Penauld (Power available [W], Power required [W])Power available, Power required [W]

Balázs GÁTI.: Performace Calculation for UAVs

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10 12 14 16 18 20 22 24 260

100

200

300

IAS [m/s]

Pow

er

[W]

IAS [m/s]

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Balázs GÁTI.: Performace Calculation for UAVs

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Balázs GÁTI.: Performace Calculation for UAVs

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Balázs GÁTI.: Performace Calculation for UAVs

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Balázs GÁTI.: Performace Calculation for UAVs

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1000

1500

2000

2500

BHP [W ]Power [W]

Balázs GÁTI.: Performace Calculation for UAVs

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250

0

0.5

1

1.5

2

x 104

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-1000

-500

0

500

TAS [km/h]RPM [1/min]

RPM/10000

[1/min] TAS

[m/s]

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•b = 3.6 m

•S = 1.0 m2

•AR = 12.1

•MTOW = 9.0 kg

Balázs GÁTI.: Performace Calculation for UAVs

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•b = 2.0 m

•S = 1.0 m2

•AR = 3.7

•MTOW = 6.0 kg

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******** SUMMARY **********

TAKE OFFZero Speed Thrust:

1.config: 32 N2.config: 32 N

TAS min:1.config: 38 km/h2.config: 35 km/h

CLIMB TAS:

1.config: 52 km/h

CRUISE TAS:

1.config: 45 km/h2.config: 43 km/h

Maximum Range1.config: 46 km2.config: 43 km

FAST CRUISETAS:

1.config: 70 km/h2.config: 70 km/h

Endurance1.config: 24 min

Balázs GÁTI.: Performace Calculation for UAVs

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1.config: 52 km/h2.config: 53 km/h

Maximum Climb:1.config: 3.3 m/s2.config: 4.8 m/s

LOITER TAS:

1.config: 42 km/h2.config: 36 km/h

Maximum Endurance :1.config: 64 min2.config: 66 min

1.config: 24 min2.config: 24 min

Range1.config: 28 km2.config: 28 km

TOP CRUISETAS:

1.config: 88 km/h2.config: 88 km/h

Endurance1.config: 13 min2.config: 13 min

Range1.config: 18 km2.config: 18 km

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5 10 15 20 25 30 351000

2000

3000

4000

5000

6000

7000

8000

9000

10000 Prop Efficiency

TAS [m/s]

RP

M [

1/m

in]

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

Balázs GÁTI.: Performace Calculation for UAVs

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10 12 14 16 18 20 22 24 26 28 3040

60

80

100

120

140

160

180

200Penauld

TAS [m/s]

Power Req. [W]Power Avail.[W]