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Process to optimize airborne noise generated by a rotorcraft in flight

A technology for rotorcraft and noise, applied to aircraft, rotorcraft, aircraft parts, etc., to reduce noise, improve comfort, and optimize noise

Pending Publication Date: 2020-10-09
EUROCOPTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one or more noise sources are prominent and dominate during certain phases of rotorcraft flight

Method used

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  • Process to optimize airborne noise generated by a rotorcraft in flight
  • Process to optimize airborne noise generated by a rotorcraft in flight
  • Process to optimize airborne noise generated by a rotorcraft in flight

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0103] Elements shown in several different figures have the same reference numerals.

[0104] 【 figure 1 】 figure 1 The illustrated rotorcraft 1 comprises a fuselage 4 , a landing gear 6 with slides, a hybrid device 10 and two rotors 2 , 3 driven in rotation by the hybrid device 10 . More precisely, the rotors 2 , 3 are the main rotor 2 arranged above the fuselage 4 and the anti-torque tail rotor 3 arranged on the tailboom of the rotorcraft 1 .

[0105] The hybrid power plant 10 includes two heat engines 11 , an electric motor 13 and a mechanical transmission box 15 . Two heat engines 11 and an electric machine 13 are mechanically connected to a mechanical transmission box 15 . A mechanical gearbox 15 is mechanically connected to the two rotors 2 , 3 . In this way, the two heat engines 11 and the electric machines 13 can drive the two rotors 2 , 3 in rotation by means of the mechanical transmission box 15 jointly or independently of each other.

[0106] The hybrid power p...

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Abstract

The invention relates to a method to optimize the noise generated by a hybrid drive (10) of a rotorcraft (1) in flight. The hybrid power device (10) drives a main rotor (2) of the rotorcraft (1) to rotate and is equipped with at least one heat engine (11), an electric motor (13) and at least one electric energy source (18) supplying power to the electric motor (13). The method comprises a determination step (120) for determining the required power provided by the hybrid device (10) for the flight phase, and a model for noise generated by one of the parameters of the at least one heat engine (11) as a function of a target noise level and of the required power of the flight phase, and a distribution step (130) for distributing the required power between the at least one heat engine (11) andthe electric motor (13) in order to limit the noise generated by the hybrid device (10).

Description

technical field [0001] The invention relates to the field of propulsion equipment for rotorcraft, in particular the restricted field of hybrid propulsion equipment. [0002] The invention relates to a method for optimizing the noise generated by a rotorcraft in flight. Background technique [0003] A rotorcraft, also called a rotorcraft, generally comprises a fuselage and at least one main rotor which is driven in rotation by a power plant and at least partially ensures the lift and / or propulsion of the rotorcraft. The rotorcraft may also include an anti-torque device. The anti-torque device sometimes consists of a secondary rotor, usually located at the rear of the rotorcraft, at the end of the rotorcraft's tailboom, and driven in rotation by its power plant. [0004] The rotorcraft may also comprise a plurality of main rotors to simultaneously and at least partially ensure lift and / or propulsion of the rotorcraft. [0005] A rotorcraft may also include one or more propu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D27/02B64D27/24B64D31/00
CPCB64D27/02B64D27/24B64D31/00B64D27/026B64D35/08Y02T50/60B64D31/06B64D31/18B64D27/33B64D27/32B64C27/04B64D27/10F01N1/00F02D35/0007
Inventor 纳伊伯·戈梅
Owner EUROCOPTER