Effect of humidity on Airbus or Boeing performance.

[tdracer]

Originally Posted by Smythe

Must really mess you up when you take a dirty turbine loss of 15%

Which affects thrust at N1 how exactly?

[megan]

Effect of humidity on gas turbine performance.

https://www.ijser.org/researchpaper/...ity-on-Gas.pdf

I challenge you to show me a Metar showing a dew point above 30C

. The world's highest reported dew point is 35 degrees, recorded on July 8, 2003, at Dhahran, Saudi Arabia The highest in the US was 31.1 at Moorhead, Minn July 19, 2011

https://www.wunderground.com/blog/we...peratures.html

[GordonR_Cape]

Originally Posted by megan

Effect of humidity on gas turbine performance.

https://www.ijser.org/researchpaper/...ity-on-Gas.pdf

. The world's highest reported dew point is 35 degrees, recorded on July 8, 2003, at Dhahran, Saudi Arabia The highest in the US was 31.1 at Moorhead, Minn July 19, 2011

https://www.wunderground.com/blog/we...peratures.html

Those record values were in my earlier post! Other than freak conditions, dew points above 30C do not routinely occur in outdoor air. And certainly not in the tropics, which was what I was pointing out to @tdracer.

The NWS office in Grand Forks, North Dakota issued this statement explaining how heavy rainfall the morning of the event had saturated the soil and left ponding water near the instrument site. Furthermore, the AWOS is surrounded by sugar beets and soy beans “two of the most prodigious transpiring plants”.

Have you looked at any Metars from Singapore, Bali, Jakarta, and other airports close to the equator? That was my challenge...

https://en.allmetsat.com/metar-taf/s....php?icao=WSSS
https://en.allmetsat.com/metar-taf/i....php?icao=WADD
https://en.allmetsat.com/metar-taf/i....php?icao=WIHH

METAR: WSSS 090630Z 14010KT 080V150 9999 FEW020TCU SCT300 32/24 Q1010 NOSIG

METAR: WADD 090630Z 26010KT 9999 FEW017 31/24 Q1010 NOSIG

METAR: WIHH 090600Z 01008KT 6000 SCT020 33/22 Q1010 NOSIG

Tropical dew points are mid-20s C (70s F), slightly higher during El-Nino/La Nina conditions. Moisture in the air is a dynamic between evaporation and precipitation, and dew points do not exceed sea-surface temperatures (except as noted above). See: https://en.wikipedia.org/wiki/Sea_su...ded_Global.png

There are exceptional areas outside the tropics, notably the Read Sea, and also the Persian Gulf. See: https://en.wikipedia.org/wiki/Bandar_Abbas#Climate

In the summer, Bandar Abbas sees some of the highest average dew points of any city in the world, averaging 27 °C (81 °F) and frequently exceeding(*) 30 °C (86 °F).

* 88F/31C maximum dew point on several days in July