Application of the ball-spine algorithm to design an axial-flow compressor blade

作者：Madadi A; Kermani M J^*; Nili Ahmadabadi M

来源：Scientia Iranica, 2014, 21(6): 1981-1992.

• Ball-spine algorithm
• Inverse design
• Compressor blade profile
• Target pressure distribution
• Computed pressure distribution

In this paper, a novel inverse design algorithm, called a ball spine algorithm, is developed to design the blade to blade flow passage of axial-flow compressors. The algorithm considers the blade surfaces as a set of virtual balls that move freely along the specified directions, called %26apos;spines%26apos;. To start the solution, an initial guess for the blade geometry is required. Then, the blade-to-blade flow field is solved using an in-house inviscid solver. Comparing the Computed Pressure Distribution (CPD) with the Target Pressure Distribution (TPD) over the blade surfaces gives guidelines in differential movements for the balls to obtain a modified geometry. For the modified geometry, new grids are automatically generated by an algebraic-elliptic grid-generator. The sequence is repeated until the target pressure is met. An error parameter, Delta PD, indicating the difference between CPD and TPD along the suction and pressure surfaces, is computed, while the blade geometry evolves toward the target geometry. For the initial guess, Delta PD is obtained as 13700 Pa, while, after 100 generations, Delta PD is reduced to 222 Pa.

• 出版日期2014-12