Abstract: The numerical simulation was used to study the effusion holes on the longitudinal wavy liner in the combustor.The investigation focused on the parameters affecting cooling effectiveness,including: opening ratio,height of ripple board,diameter of holes and height of cooling passage.Given the same total flow effusion from holes,the results show that the heat shield gets a higher average cooling effectiveness when the opening ratio is 3% compared with 6%;cooling effectiveness is sensitive to the height of ripple board,the heat shield gets the highest cooling effectiveness when the dimensionless height of ripple board is 1% compared with 2% and 3.33%;but there is a little influence on the cooling effectiveness of the liner with the change of the diameter of holes and the height of cooling passage.