Highly Accurate Solution of Limit Cycle Oscillation of an Airfoil in Subsonic Flow

Table 2

Comparisons of the amplitudes and frequencies given by the HAM Pade approximations (𝜆=−1) with the numerical solutions, where 𝑈^∗=1.5𝑈^∗𝐿.

[m, n] HAM Pade	Frequency	Relative error (%)	Pitch	Relative error (%)
[5,5]	0.07765100977663	0.11	0.13745051052294	0.05
HAM 10	0.07770384628505	0.18	0.13726535168074	−0.08
[7,8]	0.07756746357388	5e−3	0.13737312674052	−6e−3
15	0.07759388593952	4e−2	0.13735291378024	−2e−2
[10,10]	0.07756394500764	4e−4	0.13738142730826	−6e−5
HAM 20	0.07757112740482	1e−2	0.13737399877222	−5e−3
HAM N = 120	0.07756360647090		0.13738151173287