Soyuz capsule aerodynamics

[N_Molson]

Hello, :tiphat:

I'm currently working on modeling the Soyuz 7K-T capsule re-entry. So far, I've managed to code the lift and drag (thanks to a great post on that subject by FrancisDrake), but I now feel somewhat limited by my lack of knowledge in the hypersonic aerodynamics field.

My main question is : at which AoA should the capsule generate the most lift ? 10° ? 15° ? 30°? And what is the limit in terms of safety ? Given the shape of the capsule, 30° seems dangerous as it would probably expose a part of the hull to the plasma flux.

The other question is about dynamic pressure. Any idea of what dynamic pressure should typically be at the peak of reentry ?

If that can help, I've calculated that the heatshield has a surface area of 6.82 m² (if it was flat), and that the capsule has a mass of roughly 3.000 kgs (loaded).

Thanks for any help,

 

[Urwumpe]

My main question is : at which AoA should the capsule generate the most lift ? 10° ? 15° ? 30°? And what is the limit in terms of safety ? Given the shape of the capsule, 30° seems dangerous as it would probably expose a part of the hull to the plasma flux.

The other question is about dynamic pressure. Any idea of what dynamic pressure should typically be at the peak of reentry ?

I can look into my Soyuz book when I am again in my new apartment. There the AOA is at least in it.

Typical dynamic pressure can be calculated by peak acceleration.

[math]a = \frac{C_D \cdot A \cdot q}{m}[/math]