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<p>This study presents a novel simulation method for analyzing the takeoff performance of a seaplane by decoupling aerodynamic and hydrodynamic forces. Aerodynamic forces are computed using the VSPAERO potential flow solver, while hydrodynamic forces are calculated via Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations in STAR-CCM + software. A MATLAB code integrates these forces to solve the seaplane’s equations of motion in surge, heave, and pitch, assuming vertical equilibrium, until water separation occurs. The method offers sufficient accuracy, reduced computational time, and flexibility for geometric modifications. Takeoff simulations were conducted for a seaplane model with a stepped hull and varying wing airfoils (NACA 23015, Eppler 1210, NACA 4412), thrust forces (200–600&#xa0;N), elevator angles (0–30°), flap angles (25–30°), and wing areas. Results show that higher-lift airfoils (e.g., Eppler 1210) reduce takeoff distance (105&#xa0;m vs. 138&#xa0;m) and speed (20&#xa0;m/s vs. 23&#xa0;m/s) without significantly altering hydrodynamic behavior. Increased thrust shortens takeoff distance (225&#xa0;m vs. 51&#xa0;m) but does not affect takeoff speed or hydrodynamics. Elevator angles of 25–30° reduce takeoff distance (88–87&#xa0;m vs. 107&#xa0;m) and speed (19–19.6&#xa0;m/s vs. 20.1) but increase the angle of attack, posing a stall risk.</p>

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Investigating a Seaplane Takeoff Performance by Decoupled Aerodynamic-Hydrodynamic Simulation

  • 期刊论文

  • 发表日期：

    2025年12月3日

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  • Vahid Akbari,
  • Amir H. Nikseresht

摘要

This study presents a novel simulation method for analyzing the takeoff performance of a seaplane by decoupling aerodynamic and hydrodynamic forces. Aerodynamic forces are computed using the VSPAERO potential flow solver, while hydrodynamic forces are calculated via Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations in STAR-CCM + software. A MATLAB code integrates these forces to solve the seaplane’s equations of motion in surge, heave, and pitch, assuming vertical equilibrium, until water separation occurs. The method offers sufficient accuracy, reduced computational time, and flexibility for geometric modifications. Takeoff simulations were conducted for a seaplane model with a stepped hull and varying wing airfoils (NACA 23015, Eppler 1210, NACA 4412), thrust forces (200–600 N), elevator angles (0–30°), flap angles (25–30°), and wing areas. Results show that higher-lift airfoils (e.g., Eppler 1210) reduce takeoff distance (105 m vs. 138 m) and speed (20 m/s vs. 23 m/s) without significantly altering hydrodynamic behavior. Increased thrust shortens takeoff distance (225 m vs. 51 m) but does not affect takeoff speed or hydrodynamics. Elevator angles of 25–30° reduce takeoff distance (88–87 m vs. 107 m) and speed (19–19.6 m/s vs. 20.1) but increase the angle of attack, posing a stall risk.