【摘要】 采用自主研发的三维粘性气动优化设计平台对某双涵道风扇/增压级进行了气动设计优化;采用NURBS技术对该风扇/增压级各排叶片进行了参数化造型,包括二维叶型的参数化表达以及基迭线的弯、扭联合造型;采用NUMECA商用软件进行了风扇/增压级三维内外涵联算作为气动性能评估指标;基于该风扇/增压级三维内外涵联算,采用iSIGHT优化软件对风扇/增压级各排叶片进行了气动优化设计。在整机流量降低0.3428%的情况下,内涵增压级效率提高了1.43%;对风扇优化,在整机流量基本不变的情况下,整机效率提高了1.566%,并扩大了增压级的稳定工作范围。更多还原

【Abstract】 A dual ducted-fan/booster stage was aerodynamically designed and optimized by adopting a self-developed three-dimen-sional viscous aerodynamic-optimized design platform. Each row of blades in the fan/booster stage underwent a parameter-ized modeling by employing NURBS technology,including a parameterized expression of two-dimensional blade profiles and a skew-and-twist combined modeling of base superimposition lines. Commercial software NUMECA was used to per-form a three-dimensional calculation of both inner and outer ducts of the fan/booster stage,the calculation results of which serve as an index for evaluating the aerodynamic performance. Based on the three-dimensional calculation of both inner and outer ducts of the fan/booster stage,optimization software iSight was adopted to perform an aerodynamic design opti-mization of each row of blades in the fan/booster stage. Under the condition that the whole engine flow rate has decreased by 0.3428 % ,inner-duct booster stage efficiency went up by 1.43 %. With fan optimization and under the condition of the flow rate of the machine being kept basically unchanged,the overall efficiency has increased by 1.566% and the stable operation scope of the booster stage,expanded.更多还原