Data-driven Pressure Recovery in Diffusers
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866918244478091264 |
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| author | Salazar, Juan Augusto Paredes Goel, Ankit Costich, Rowen Koca, Meliksah Tumuklu, Ozgur Amitay, Michael |
| author_facet | Salazar, Juan Augusto Paredes Goel, Ankit Costich, Rowen Koca, Meliksah Tumuklu, Ozgur Amitay, Michael |
| contents | This paper investigates the application of a data-driven technique based on retrospective cost optimization to optimize the frequency of mass injection into an S-shaped diffuser, with the objective of maximizing the pressure recovery. Experimental data indicated that there is an optimal injection frequency between 100 Hz and 300 Hz with a mass flow rate of 1 percent of the free stream. High-fidelity numerical simulations using compressible unsteady Reynolds-Averaged Navier-Stokes (URANS) are conducted to investigate the mean and temporal features resulting from mass injection into an S-shaped diffuser with differing injection speeds and pulse frequencies. The results are compared with experiments to confirm the accuracy of the numerical solution. Overall, 2-D simulations are relatively in good agreement with the experiment, with 3-D simulations currently under investigation to benchmark the effect of spanwise instabilities. Simulation results with the proposed data-driven technique show improvements upon a baseline case by increasing pressure recovery and reducing the region of flow recirculation within the diffuser. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_10801 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Data-driven Pressure Recovery in Diffusers Salazar, Juan Augusto Paredes Goel, Ankit Costich, Rowen Koca, Meliksah Tumuklu, Ozgur Amitay, Michael Fluid Dynamics Systems and Control This paper investigates the application of a data-driven technique based on retrospective cost optimization to optimize the frequency of mass injection into an S-shaped diffuser, with the objective of maximizing the pressure recovery. Experimental data indicated that there is an optimal injection frequency between 100 Hz and 300 Hz with a mass flow rate of 1 percent of the free stream. High-fidelity numerical simulations using compressible unsteady Reynolds-Averaged Navier-Stokes (URANS) are conducted to investigate the mean and temporal features resulting from mass injection into an S-shaped diffuser with differing injection speeds and pulse frequencies. The results are compared with experiments to confirm the accuracy of the numerical solution. Overall, 2-D simulations are relatively in good agreement with the experiment, with 3-D simulations currently under investigation to benchmark the effect of spanwise instabilities. Simulation results with the proposed data-driven technique show improvements upon a baseline case by increasing pressure recovery and reducing the region of flow recirculation within the diffuser. |
| title | Data-driven Pressure Recovery in Diffusers |
| topic | Fluid Dynamics Systems and Control |
| url | https://arxiv.org/abs/2512.10801 |