# How to set the velocity inlet angle for cassette air conditioner

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June 6, 2017, 21:38
How to set the velocity inlet angle for cassette air conditioner
#1
New Member

Selangor
Join Date: Jun 2017
Posts: 7
Rep Power: 9
Hi there,

I have issues with setting the velocity angle, I'm not too sure how to begin as I'm new to this software. Hope that someone could help me with the velocity inlet angle setup.
Attached Images
 inlet.jpg (48.6 KB, 21 views) velocity inlet setup.jpg (85.8 KB, 19 views)

 June 7, 2017, 00:24 Cartesian components #2 Senior Member   Svetlana Tkachenko Join Date: Oct 2013 Location: Australia, Sydney Posts: 407 Rep Power: 14 It is probably more intuitive to specify the velocity Cartesian components (rather than magnitude and direction). Do a hand calculation to find what the components are, and then put them into CFX. Xiang likes this.

June 7, 2017, 01:50
#3
New Member

Selangor
Join Date: Jun 2017
Posts: 7
Rep Power: 9
Hi Светлана,

Thanks for the quick response and the suggestion. Appreciate it a lot. I did some manual calculation but i'm not sure whether is right. The following attachments are the calculations i did, would u mind checking it for me?

Mistake on the calculation: x-component is +5.2 m/s & z-component is +5.2 m/s
Attached Images
 velocity cartesian.jpg (54.1 KB, 14 views) velocity cartesian 2.jpg (65.2 KB, 13 views)

June 8, 2017, 22:48
Confirm angles
#4
Senior Member

Svetlana Tkachenko
Join Date: Oct 2013
Location: Australia, Sydney
Posts: 407
Rep Power: 14
It looks confusing, let's start with talking about what information you already know. Did I draw it correctly in the attachment? Angle BAC is 30°, and angle BAD is 45°?
Attached Images
 1.png (7.5 KB, 11 views)

June 9, 2017, 04:00
Sorry for the confusion
#5
New Member

Selangor
Join Date: Jun 2017
Posts: 7
Rep Power: 9
Hey,

So sorry for the confusions. I had calculated wrongly and the following pictures are the correct 1. Hope that it is clearer to you this time.

Thank you.
Attached Images
 1st calculation.jpg (75.9 KB, 12 views) 2nd calculation.jpg (60.9 KB, 9 views)

 Tags air condition simulation, velocity angle, velocity inlet