Near space propeller

A technology close to space and propellers, applied in propellers, aircraft parts, transportation and packaging, etc., can solve the problems of lower lift-to-drag ratio, low propeller efficiency, and failure to meet the use requirements, etc., to achieve the effect of increasing lift-drag ratio and improving efficiency

A technology close to space and propellers, applied in propellers, aircraft parts, transportation and packaging, etc., can solve the problems of lower lift-to-drag ratio, low propeller efficiency, and failure to meet the use requirements, etc., to achieve the effect of increasing lift-drag ratio and improving efficiency

CN102963522AActive Publication Date: 2013-03-13CHINA ACAD OF AEROSPACE AERODYNAMICS
4 Cites 30 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Near space propeller
  • Near space propeller
  • Near space propeller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] One available airfoil diagram is shown in figure 1 , the propeller can work under low Reynolds number (Reynolds number less than 10e6). The airfoil data of one available airfoil is given below, see Table 1:

[0036] Table 1 airfoil data table (unit: mm)

[0037]

[0038] According to the characterization of the above-mentioned blade shape, the chord length and angle of attack β of the airfoil at different stretch positions are adjusted to obtain a propeller blade shape in the adjacent space. Specifically:

[0039] Chord length (170mm) and angle of attack β (32.52 degrees) at the position of 0.3 span;

[0040] Chord length (150mm) and angle of attack β (26.21 degrees) at the 0.35 span position;

[0041] Chord length (125mm) and angle of attack β (20.50 degrees) at the position of 0.45 span;

[0042] Chord length (104mm) and angle of attack β (17.07 degrees) at the position of 0.6 span;

[0043] Chord length (92mm) and angle of attack β (15.50 degrees) at the 0.7...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Chord lengthaaaaaaaaaa
Chord lengthaaaaaaaaaa
Chord lengthaaaaaaaaaa
Login to View More

Abstract

A near space propeller comprises propeller blades and propeller hub. Two propeller blades are connected through the propeller hub to form an integral structure; and the propeller blades have the following structure: chord length of 160-180mm and angle of attack beta of 31-34 degree at 0.3 elongation position; chord length of 140-160mm and angle of attack beta of 25-28 degree at 0.35 elongation position; chord length of 115-135mm and angle of attack beta of 18-21 degree at 0.45 elongation position; chord length of 95-110mm and angle of attack beta of 16-18 degree at 0.6 elongation position; chord length of 85-95mm and angle of attack beta of 14-16 degree at 0.7 elongation position; chord length 65-75mm and angle of attack beta of 13-14 degree at 0.75 elongation position; and chord length of 45-55mm and angle of attack beta of 12-13 degree at 0.9 elongation position.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
13 Mar 2013
Publication
CN102963522A