thuerey-group/CRMpert
收藏资源简介:
--- license: cc-by-sa-4.0 --- # CRMpert Dataset This dataset contains flow fields around wings perturbed from the Common Research Model. It contains 288 shapes and 2145 flow fields, acting as a **task-specific** dataset to fine-tune a pre-trained model for a more precise local surrogate model. ## Perturbation The wing geometry is controlled at seven spanwise sections. At each control section, the sectional airfoil is parameterized using 20 CST coefficients, each perturbed within $\pm 40\%$ of the corresponding CRM coefficient. Dihedral offsets at the control sections are perturbed within $\pm 0.05 \cdot c_{\mathrm{root}}$, and twist angles are sampled uniformly from $-3^\circ$ to $0^\circ$. The spanwise distributions of these parameters are then constructed via interpolation between the control sections. <img src="https://cdn-uploads.huggingface.co/production/uploads/6878e482bd4380c813fd99de/yvjfmmIm8oEfXKwV8U6Cd.png" alt="sections" width="40%"> ## Data format 1. Geometric parameters `samples.parquet` includes the perturbed values of the wings. |indexs|type|variables|comments| |-|-|-|-| |0|wing shape index (corresponding to in `geom0.npy`)| |1|operating condition index (count in each wing shape) | |2-3|operating condtions | angle of attack (in degrees), mach number| |4-5| reference values | reference area (to calculate coefficient), half span length| |6-8| coefficient from the solver| lift, drag, pitching moment (acc. LE)| |9-11|coefficient by recalculating from the surface flow (there are ones used for ML models)| lift, drag, pitching moment (acc. LE) | |12-81| upper surface CSTs | 7 x sections, 10 x coefficients under each section | |82-151| lower surface CSTs | 7 x sections, 10 x coefficients under each section | |152-157| twists angles | sections 1-6 | |158-164| dihedrals | 7 x sections | 2. Index file (`index.npy`), Reference surface mesh and surface physical quantities on this reference mesh (`geom0.npy`, `data.npy`). Please refer to the [SuperWing dataset](https://huggingface.co/datasets/yunplus/SuperWing)




