Design, Analysis and Tests of a Tri–Tiltrotor Aircraft

Chen, Yunhai; Zheng, Jie; Shen, Zishi; Xiao, Ping; Tong, Mingbo; Guo, Liang; Xin, Yingying

doi:10.2514/6.2019-2883

Cited by 3 publications

(1 citation statement)

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“…[10][11][12] Besides, a series of electric propulsion VTOL aircraft have also received the attention of researchers and made good progress with the development of batteries in recent years. [13][14][15] However, since the energy density of batteries cannot reach the level of fuel, and the size/weight of high-power motors cannot reach the level of gas turbines, such aircrafts cannot achieve long range and heavy load for the time being. The literature 16 divides the abovementioned VTOL propulsion system for the fixedwing aircraft into three forms: direct injection, lift fan, and thrust fan and compares the various schemes.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of gas-driven fan propulsion system for fixed-wing vertical take-off and landing aircraft

Zhou

Huang

Xia

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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As a propulsion system for vertical take-off and landing (VTOL) aircraft, the gas-driven fan propulsion system has received some attention in recent years due to its simple mechanical structure and good performance. During the operation of the propulsion system, the core turbofan exhaust is directed to the tip turbine to drive the ducted fan to obtain thrust, and the louvered vector exhaust device is used to achieve lift/thrust switching. However, due to the linkage characteristics of the guide vanes of the exhaust device, the exhaust area will gradually change with the deflection of the guide vanes. This may cause uncertain effects on the system. Besides, considering the development cost of the propulsion system, it is necessary to clarify whether the core turbofan needs to be redesigned based on the characteristics of the system. Further, the transitional performance (VTOL to flight) of the propulsion system also needs to be studied. To this end, this study established an overall model of the gas-driven fan propulsion system combined with the characteristics of the core turbofan to analyze these problems. The results indicate that the louvered vector exhaust device can well match the gas-driven fan propulsion system. And when the propulsion system is composed, the gas-driven fan will not significantly affect the operation characteristics of the core turbofan. Besides, the preliminary analysis shows that the gas-driven fan propulsion system can meet the power requirements of the transition state of the fixed-wing VTOL aircraft. And the characteristics of the propulsion system may make the take-off thrust-weight ratio requirement of the fixed-wing VTOL aircraft be as low as 1.1.

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