[[alternative]]A Study of Aircraft Performance Parameter under Adverse Weather Conditions

[[abstract]]某些天氣現象會對飛行安全造成相當大的危害，例如低空風切、亂流、大雨和飛機積冰等現象。本研究的目的是欲藉由低空風切危害參數F參數為媒介，對在不良天候下飛行的飛機，其性能將會出現何種程度的衰減進行瞭解。本文將先建立三維低空風切風場及三維F參數，然後將其所計算出來結果與代表亂流的T參數相加。在大雨和飛機積冰的部分，則採用吾人前所建立的計算流力法解析飛機的空氣動力係數，將其衰減的飛機性能計算出，並換算出相對應的F參數值。最後再將飛機可能遭遇的惡劣天氣現象之等效F參數和T參數相加成為FT參數，並應用最新發展的FW參數，以求得在同時面對多種惡劣天氣現象下，飛機所受到的影響總合，並進而探討多種惡劣天氣同時存在時，單獨天氣現象對飛機所造成影響之比重。[[abstract]]The purpose of this research is to find out, by using existing low level windshear F-factor as the medium, the degrees of performance degradation for aircraft flying under different adverse weather conditions. First set up the 3-D F-factor, then combined with turbulence T-factor developed earlier. Secondly, take the aircraft performance calculated from heavy rain and ice accretion by existing CFD techniques; convert it to an equivalent F-factor value. Finally, a new FW-factor has been derived from different F-factor and T-factor values for the four adverse weather conditions that the aircraft might face. It is believed that this FW-factor represents a measuring weighting parameter for each adverse weather condition. Through the combining efforts in flight dynamics, aerodynamics, performance parameter developments, this study represents a first try in quantifying different adverse weather influences on aircraft performance degradation.[[sponsorship]]教育部[[notice]]20130320格式已修正by陸桂英[[conferencetype]]國內[[conferencedate]]20071116~20071116[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]臺北市, 臺