Dream Chaser

by Stephen Miller, Sierra Nevada Corporation

Thermal analysis of Dream ChaserThe Dream Chaser spacecraft is a reusable, lifting-body vehicle capable of traveling to low Earth orbit and landing on a runway, currently in development by Sierra Nevada Corporation (SNC) Space Systems of Colorado. The engineers at SNC use Thermal Desktop to perform system-level and detailed thermal analysis of the Dream Chaser spacecraft, making use of the following advanced features:

  • The Boundary Condition Mapper is used to map transient reentry heat loads and pressures generated using external computational fluid dynamics (CFD) to the vehicle model.
  •  User-controllable logic (controlled by the Case Set Manager) is used to model non-linear events such as switching on/off avionics boxes and to simplify changing between hot and cold environments.
  • Liquid and gaseous flow loops are simulated using simple one-way thermal networks and FloCAD.
  • Tag Sets are used to simplify connecting assembly-level meshes in the system-level model.
  • The model uses a wide range of thermophysical (anisotropic, temperature- and pressure-dependent) and optical properties.
  • The vehicle’s solar arrays track the sun using Articulators
  • The Stack Manger is used to easily generate aggregate properties for thermal protection system (TPS) multi-material insulation.

Click here to learn more about the Dream Chaser spacecraft

 

Advanced Pipes in FloCAD
Thursday November 14, 9-10am MT (8-9am PT, 11am-noon ET)
This webinar introduces advanced features for FloCAD pipes in addition to working with complex geometry. Complex geometry includes interior fins and surfaces for heat transfer, flow around enclosed objects, annular flow, concentric pipes, and more. FK Locators and TEEs as modeling objects will also be introduced.
Custom Heat Transfer and Pressure Drops
Tuesday November 19, 2-3pm MT (1-2pm PT, 4-5pm ET)
Do you know what the default assumptions are in FloCAD, and whether or not they apply in your situation? Do you know how far you can go past that starting point? The answer: pretty far. There are numerous mechanisms in FloCAD for adjusting factors, scaling uncertainties, and applying different or supplemental correlations. This webinar summarizes the options available to you to customize your flow models to make sure that they apply to each new situation you encounter.
Heat Exchangers: Detailed and System-level
Thursday November 21, 2-3pm MT (1-2pm PT, 4-5pm ET)
This is two webinars in one. The first explains the use and assumptions behind the FloCAD HX system-level modeling object. The second webinar describes detailed-level modeling of complex heat exchanger passages, including application of Compact Heat Exchanger (CHX) methods.
Starting in 2020, we will begin offering Introduction to Thermal Desktop and Introduction to RadCAD as either in-person training or online training, alternating between online and in-person every three months. The training uses lectures and demonstrations to introduce you to basic Thermal Desktop and RadCAD usage. Hands-on tutorials provide practice building models and interpreting results (tutorials are completed by students outside of the online class time).
 
The next training class will be an online format in January 2020:
  • Introduction to Thermal Desktop (and SINDA) - A three-part series on January 14, 16, and 21 from 9am to 12pm, Mountain time
  • Introduction to RadCAD - January 23 from 9am to 12pm, Mountain time
For up-to-date schedules, fees, and policies, visit our Product Training page. To register for the class above, complete our registration form and select "Online" for the Training Format.
 
If you are interested in product training for your company based on your schedule, please contact us to obtain a quote for training between 8-12 attendees. We can come to your facility or the lectures can be presented online. Descriptions of the available classes can be found in our course catalog.
 
To keep up with our training opportunities, take a look at our new Events and Training Calendar.