[SS2S-Main] Re: Cfd simulation
- From: Vicente Alvero Zambrano <vicente_alvero_14@xxxxxxxxxxx>
- To: "sugarshot@xxxxxxxxxxxxx" <sugarshot@xxxxxxxxxxxxx>
- Date: Thu, 31 Jul 2014 16:43:04 +0200
Hi Hans,
I have read a bit over this report. I find it a great job. Do you think that it
is possible to do a calculation sheet or fortran program to have data? Anyway,
I'd like to also do a cfd simulation to have image.
What do you think?
Cheers
> El 31/07/2014, a las 12:06, "Hans Olaf Toft" <hot@xxxxxxxxxxxxx> escribió:
>
> There were previously made some thermal simulations for MiniSShot. Although
> it is a worthy effort to produce flow simulations around a nosecone they are
> not really useful for calculating the true thermal load on the structure as
> they show the static temperature field corresponding to flying at a
> particular velocity infinitely.
>
> Calculation of skin temperature requires calculation of the heat flux into
> the structure, the radiation to the universe and knowledge of the heat
> capacity of the structure. One will have to solve the dynamic heat problem,
> so the CFD You are looking for must be able to replicate the velocity profile
> and solve for the accumulated surface temperature - or - You would have to do
> a large number of static calculations and then use them as input for the
> calculation of skin temperature.
>
> I suggest using the method of NACA Technical Note 1725, that enables a
> simplified calculation of the skin temperature of a conical body. Repeated
> calculations assuming little or no transversal heat flow could then give an
> estimated thermal load of the nosecone *except* the apex for which the model
> does not apply. CFD calculations will tend to give an upper boundary of the
> skin temperature, so this could possibly be used for the dimensioning the
> apex heat capacity.
>
> Hans
>
>> On 07/31/2014 11:13 AM, Lampe, Mattias SLC CT PEK wrote:
>> Hi Vicente,
>>
>>
>>
>> as far as I know, there is some Open Source Software that could possibly
>> perform this kind of simulations (e.g. OpenFOAM), but it takes quite a bit
>> of expert knowledge (on fluid dynamics AND on numerical simulation methods)
>> to get any meaningful results out of such software.
>>
>>
>>
>> A fast PC would probably be sufficient for the number crunching, so what
>> you really need is someone with a solid background in fluid
>> dynamics and practical simulation experience.
>>
>>
>>
>> Mattias
>>
>>
>>
>> From: sugarshot-bounce@xxxxxxxxxxxxx [mailto:sugarshot-bounce@xxxxxxxxxxxxx]
>> On Behalf Of Vicente Alvero Zambrano
>> Sent: Thursday, July 31, 2014 4:57 PM
>> To: sugarshot@xxxxxxxxxxxxx
>> Subject: [SS2S-Main] Re: Cfd simulation
>>
>>
>>
>> That is perfect. Can you do it? If you want, I can give you technical
>> drawings and data information to the simulation. What do you think?
>>
>>
>> El 30/07/2014, a las 22:01, "Nathan Asdourian" <rawliquid@xxxxxxxxx>
>> escribió:
>>
>> I likely have sufficient computing power, unless it requires a server farm.
>>
>> I also know enough about computers to likely get whatever software is needed
>> running, but I certainly don't know enough to do it, nor do I have the
>> software. If anyone has those two things but lacks the resources to do it,
>> let me know and I can get you access to my system.
>>
>>
>>
>> On Wed, Jul 30, 2014 at 12:10 PM, Vicente Alvero Zambrano
>> <vicente_alvero_14@xxxxxxxxxxx> wrote:
>>
>> Yes, two things. We need a complete simulation.
>>
>>
>> El 30/07/2014, a las 19:23, "Nathan Asdourian" <rawliquid@xxxxxxxxx>
>> escribió:
>>
>> I assume this means you are looking for someone that knows how to do it
>> rather than just computing resources?
>>
>>
>>
>>
>>
>> --
>> I respectfully decline the invitation to join your hallucination.
>>
>
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