Comparative Analysis of Mathematical and Natural Models in Determining the Coefficient of Aerodynamic Nose Drag

The paper presents a comparative analysis of mathematical and full-scale models in determining the aerodynamic nose drag coefficient. aim work is to assess adequacy natural coefficient possibilities developing an approach for computer planning rhinosurgical interventions based on study geometric functional characteristics real personalized internal structure upper respiratory tract according diagnostic data computed tomography. According results experimental tests model obtained by 3D printing, it possible calculate value obtaining pressure drop values - total losses corresponding given air flow rates. discrepancy between coefficients this case did not exceed 15% explained methodological errors associated with approaches calculating nasal cavity, particular, impossibility taking into account all local disturbances their mutual influence, properties plastic surface channels during tests.