Nozzle Test Case:
The nozzle test case being investigated for PAW-5 is a convergent nozzle attached to a plenum with a cooled plate. The nozzle exhaust is heated and interacts with the cooled plate downstream of the nozzle exit. This configuration is representative of film cooling applications and was tested in NASA Glenn’s Small Hot Jet Acoustic Rig (SHJAR). The described problem was chosen to be the PAW-5 nozzle test case with goal of gaining more insight into the prediction capabilities and/or limitations of current solvers for film cooling applications, which involve both mixing and heat transfer. Additionally, the goal is to establish best practices and enhance our understanding of how to properly simulate these types of problems.
The participant guide for the nozzle test case is provided in the link below. The guide defines the details of the geometry, common inputs to be used by PAW-5 participants, and the required output for the nozzle test case.
Grid and Geometry Files:
A grid family consisting of four mixed-element grids was produced by Pointwise for PAW-5 participants. Both the geometry and grids are available for download using the link below. Note that the grids are available in both CGNS and WIND formats and the geometry is provided in IGES format. If another grid format is desired, the Pointwise files are also available for download using the provided link. Participants may download the Pointwise files and export the grid in any available format. For any issues encountered with the nozzle grids, participants may contact Carolyn Woeber (firstname.lastname@example.org) or Kristen Shoemake (email@example.com) of Pointwise Inc.
Grid Size Information:
Four levels of grid refinement are provided for the nozzle test case. Note that all of the grids consist of mixed-elements utilizing a combination of tetrahedra, prisms, pyramids, and hexahedra elements. The following grids are included in the provided download link.
PAW5_Nozzle_HexTet_22.9MillCells_Coarse – 22.9*10^6 cells / 12.6*10^6 points
PAW5_Nozzle_HexTet_56.4MillCells_Medium – 56.4*10^6 cells / 34.3*10^6 points
PAW5_Nozzle_HexTet_150MillCells_Fine – 150*10^6 cells / 100*10^6 points
PAW5_Nozzle_HexTet_413MillCells_ExtraFine – 413*10^6 cells / 291*10^6 points
Experimental Data (NEW):
The participant document mentions the availability of experimental data for two other set points (23 and 49) that participants can use to anchor their solutions. The data and supporting document can be found using the links provided below.
Wernet, M.P., Georgiadis, N.J., Locke, R.J., Thurman, D.R., and Poinsatte, P.E., “PIV and Rotational Raman-Based Temperature Measurements for CFD Validation of a Perforated Cooling Flow – Part 1,” AIAA Paper 2020-1230, Jan. 2020. Also NASA TM 2019-220227, July 2019.
Participant data files are to be completed and returned to the workshop committee.