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E RRATA IN D OCTORAL T HESIS

The seedgas result in Figure 14 (p. 49) is corrected to account for a variation of the pitchwise pressure variation on the hub. This is done according to Eq 7-4 by Teuber et al. [42].

Φ

0𝑚𝑖𝑛,𝑟𝑒𝑓

Φ

0𝑚𝑖𝑛

= √ 𝐶𝑝

𝜃,𝑟𝑒𝑓

𝐶𝑝

𝜃

7-4

For increasing ν

ts

, the resulting Φ

0minSeedgas

decreases with the operating speed as the main contributor to the variation.

Figure 14: Variation of minimum required purge rate in terms of Φ

0

to suppress ingestion based on Eq. 7-2 and 7-3 across the operating speed range in terms of ν

ts

and for two

pressure ratios π, compared to seedgas results and tested purge rates 0

0.2 0.4 0.6 0.8 1 1.2

0.25 0.35 0.45 0.55 0.65 0.75

N on -dime ns ion al fl ow pa ra me te r Φ

0

[- ]

Isentropic Velocity Ratio ν

ts

[-]

Φ_0EImin π 1.23 Φ_0EImin π 2.06 Φ_0RImin π 1.23 Φ_0RImin π 2.06 Test

Φ_0minSeedgas

References

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