Geostationary Lightning Mapper

Thermal and fluid flow analysis for GLMThe Geostationary Lightning Mapper (GLM) for the GOES-R spacecraft will provide continuous measurement of lightning (in-cloud, cloud-to-cloud, and cloud-to-ground) in the Western hemisphere from a geostationary orbit. The system will collect lightning location and frequency data to aid the forecasting of storm intensity.

The driving thermal requirement for the GLM thermal design was to keep the flocal plane array (FPA) at 25oC ±2oC for any operating radiator temperature between -10oC and +12oC. To achieve this goal, the system uses parallel, temperature-controlled, loop heat pipes (LHPs) located between the FPA interface and a remote radiator. Thermal Desktop and FloCAD were used to simulate transient circulation of the two-phase working fluid within the two LHPs and predict the temperature distribution across the condenser plate. It was also used to validate the method of temperature control for the LHP. Thermal Desktop and FloCAD were selected for the following reasons:

  • Simultaneously solve the flow momentum, energy, and mass conservation equations for the two-phase and single-phase fluid flow for each fluid lump and path separately as well as for the two fluid submodels.
  • Model heat transfer between the fluid and the structure (fluid convection).
  • Model system heat transfer: conductive (conduction in the condenser plate), and radiative (radiation between the environment to the LHP components).
  • Model the phase change heat transfer (evaporation and condensation).
  • FloCAD provides unique and proven tools for modeling LHPs.
  • The ability to model LHP startup transients.
  • The ability to assess load sharing between parallel LHPs.
  • The ability to easily correlate a model to test results.

Download the publication for more information on this system

 

Choking and High-speed Flow

Tuesday December 17th, 2pm MST

When flow velocities get big, things gets interesting. Above Mach=0.1, the bulk fluid "sees" a wall that is warmer than the structural temperature due to deceleration within the boundary layer. Above Mach=0.3, kinetic energy changes cease to be negligible. And of course, nothing moves faster than Mach=1.0 for internal flow. When you also add in changes in flow area, or changes in phase ... well, let's just say that doesn't simplify anything.

This webinar will introduce you to the phenomena involved, with a focus on the FloCAD modeling parameters available and their associated correlations and assumptions.

Click here to register

Turbomachinery and Rotating Passages (Secondary Flows)

Thursday December 19th, 2pm MST

Are turbomachines a component in your system, and you'd like to treat them as a "black box"?

Or are they the focus of your work, and the cycle is just a boundary condition to you?

Either way, this webinar will have something to offer you. Each type of turbomachine will be covered: pumps and fans, positive and variable displacement compressors, and turbines (whether gas or hydraulic). Methods for modeling systems like turbochargers and turbopumps will be introduced. Tools for handling spinning flow passages and rotating cavities will be presented.

Click here to register

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.