[SS2S-Main] Re: Cfd simulation
- From: Vicente Alvero Zambrano <vicente_alvero_14@xxxxxxxxxxx>
- To: "sugarshot@xxxxxxxxxxxxx" <sugarshot@xxxxxxxxxxxxx>
- Date: Thu, 31 Jul 2014 20:22:22 +0200
Perfect. The tip is like the showed in the thermal ablative experimentation
part two.
> El 31/07/2014, a las 20:19, "Hans Olaf Toft" <hot@xxxxxxxxxxxxx> escribió:
>
> If the thickness is 3mm everywhere, then there is no need for a drawing.
> Hans
>> On 07/31/2014 07:42 PM, Vicente Alvero Zambrano wrote:
>> I forget it. The thickness is 3 mm and the material is glass fiber
>>
>> El 31/07/2014, a las 18:50, "Hans Olaf Toft" <hot@xxxxxxxxxxxxx> escribió:
>>
>>> I have a software implementation of this method. I have never
>>> tried doing a profile of an entire nosecone though, but if You send me a
>>> drawing of the nosecone where I can see the thickness and material, I will
>>> do the sim. Could be interesting to compare with CFD snapshots.
>>>
>>> Hans
>>>> On 07/31/2014 04:43 PM, Vicente Alvero Zambrano wrote:
>>>> 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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