In order to be able to determine with precision the location of the stagnation point at different zones along the leading edge of an aerodynamic profile, a system comprises rows of pressure sensors distributed on either side of the leading edge and forming, virtually, patterns that are spaced apart from one another in the form of simple polygonal lines, and a computer connected to the pressure sensors. The computer determines, along each of the patterns, a respective stagnation point position that is defined by a curved abscissa for which a pressure interpolated on the basis of pressure measurements provided by the pressure sensors of the corresponding row is at a maximum, and by an altitude evaluated on the basis of respective altitude data from the pressure sensors of the corresponding row.

Apparatus and associated methods relate to detecting turbulence of an airstream over an airfoil surface of an aircraft using a sequence of acoustic transducers attached to the airfoil surface of the aircraft along a path. Each of the sequence of acoustic transducers is configured to detect acoustic waves indicative of airstream condition proximate the acoustic transducer. A processor is configured to determine, for each of the sequence of acoustic transducers, a level of turbulence of the airstream proximate the acoustic transducer.

A wall surface pressure measurement structure measures a wall surface pressure in a duct. Measurement holes are formed in different positions in a circumferential direction on an inspection surface of a wall surface of the duct. The inspection surface is orthogonal to an extending direction of the duct. A pressure chamber communicating with the measurement holes is provided on an outer peripheral side of the duct. The pressure chamber is coupled to a pressure gauge via a pressure pipe.

Provide is a method of estimating free-stream inflow at a downstream wind turbine of a wind park, the method including: selecting, from plural candidate wind turbines previously defined specifically for the downstream wind turbine, an upstream wind turbine based on a currently determined wind direction; using determination equipment of the selected upstream wind turbine to determine the free-stream inflow.

Described are various embodiments of an aerodynamic drag monitoring system and method. In one embodiment, a system is described to comprise a motion sensor and an aerodynamic sensor operable to acquire respective sensor values each associated with a respective sensor noise variance, a digital data storage medium having stored thereon a digital motion dynamic model and preset initialization parameters, and a digital data processor operable to iteratively process measured sensor values against the model to output a predicted value for a predicted aerodynamic drag variable over time while accounting for each sensor noise variance.

A flight test system for a flapping-wing aerial vehicle includes a host computer platform, a measurement mechanism, and a wind tunnel. The measurement mechanism is configured to mount a to-be-tested flapping-wing aerial vehicle prototype. The measurement mechanism includes an Euler angle controller, a flow angle controller, and a tripod. The flow angle controller is mounted on the tripod. The Euler angle controller is in transmission connection with the flow angle controller. The flapping-wing aerial vehicle prototype is detachably connected to the Euler angle controller by using a first connecting member. The host computer platform is in communication connection with the measurement mechanism and the wind tunnel, and is configured to control a wind speed of the wind tunnel and display a flight status of the flapping-wing aerial vehicle prototype in real time during test.

A measurement vehicle for use with a vehicle under a coastdown test on a surface includes a chassis including one or more wheels, and a propulsion system coupled to the chassis. The propulsion system is configured to drive the one or more wheels to move the measurement vehicle relative to the vehicle. The measurement vehicle includes at least one sensor configured to observe one or more conditions associated with the coastdown test and a communication system configured to transmit the one or more conditions to the vehicle.

It is described a method for determining a characteristic of air flow close to a surface of a rotating blade of a wind turbine, the method including: measuring at least one value of the temperature of air close to the surface of the blade; and deriving the characteristic of the air flow based on the temperature value.

The invention relates to a device for simulating the centrifugal acceleration applied to at least one aeronautical turbomachine rotor blade. This device is notable in that it comprises at least one rotor disc (2) comprising a rim in which there are formed a plurality of pockets (23) delimited by two lateral teeth (24) and at least one simulation test (3) which comprises a screw (32), a spacer (33) and a dummy blade (31), in the dummy blade comprises a bore (347), which is tapped over at least part of its length and in that the dummy blade, the screw and the spacer are configured and arranged in such a way that when the screw is screwed into the tapped bore, the root (35) of the dummy blade is engaged in the pocket in the disc, the screw comes into abutment against the spacer and presses same against the two lateral teeth situated one on each side of the pocket in the rotor disc and that this causes the dummy blade to move towards the outside of the disc.

A wake generator for placement in a wind tunnel between a wind source and a test object for generating a predetermined wake pattern, comprising: a first frame member comprising a first track formed thereon, the first track having a rounded first side and a flat second side; a mounting plate disposed within a perimeter of the first track, the mounting plate rotatable relative to the first frame member about a first axis; and a plurality of bars slidably engaged to the mounting plate and structurally configured to traverse along the first track when the mounting plate is rotated about the first axis, where each of the plurality of bars comprises a pivotal connection allowing each of the plurality of bars to pivot about the pivotal connection when traversing along the first track, wherein the plurality of bars are parallel to the track on the second side of the wake generator.