新型襟翼舵水动力性能系列试验

Hydrodynamic Performance Test Research on a New Type of Flap Rudders

本文通过对新型襟翼舵舵模的L9（34）正交试验研究，给出一套包括襟翼舵法向力导数fα、临界攻角α(kp)和法向力系数CN的回归公式，并经9000吨自卸式水泥船新型襟翼舵舵力试验验证，表明计算公式对同类型的襟翼舵是完全适用的。在与普通舵的比较中发现，新型襟翼舵确有升力系数C高，压力中心纵向位置C变化不大等优点。对系列舵模试验结果分析还可以得知，对襟翼舵水动力性能影响最大的是尾弦比亚，展弦比入其次，厚度比δ最小。

In this paper, a nounal test with table L9(34) has been ed for a new type of flap rudders, and put forward some regression formulae of hydrodynamic performance,such as rudder normal force derivahve fa, the critical angle of attack ah and rudder nounal force coefficient CN, these formulae had been validated by the flap rudder in 9000t cement - carrier ship. Through the comparison with hydrodynamic performance of ordinary rudder,obviously there were a higher rudder normal force coefficient CN and better stability pressure center coefficient CP(about 0. 5 in these formulae). The effect of flap rudder hydrodynamic performance on rudder tail-chord ratio t is the mest significant, rudder aspeCt ratio λ takes the second place, and mdder thickness ratio & takes the third place.