CN207015343U

CN207015343U - A kind of ultrahigh speed pipeline train shape of low aerodynamic drag

Info

Publication number: CN207015343U
Application number: CN201720464799.9U
Authority: CN
Inventors: 毛凯; 李少伟; 林烨; 杨慧君; 黄承静
Original assignee: Beijing Research Institute of Mechanical and Electrical Technology
Current assignee: China Aerospace Science and technology Flight Technology Research Institute (China Aerospace Haiying Electromechanical Technology Research Institute)
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2018-02-16
Anticipated expiration: 2027-04-28

Abstract

The utility model discloses a kind of ultrahigh speed pipeline train shape of low aerodynamic drag, the car body profile is tip fine stern profile, and smoothly transitted using SPL with car body, car body section is special geometric figure, the utility model can have the aerodynamic configuration of smoothness simultaneously on the basis of larger body volume, and can significantly reduce the air drag during train is run at high speed.

Description

A kind of ultrahigh speed pipeline train shape of low aerodynamic drag

Technical field

It the utility model is related to bullet train aerodynamic configuration technical field, and in particular to a kind of ultrahigh speed of low aerodynamic drag Pipeline train shape aerodynamic arrangement.

Background technology

In bullet train Design of Aerodynamic Configuration, reduce configuration design of the train pneumatic resistance for bullet train and close very much Key, in order that aircraft has an outstanding air drag performance, car body cross section, car body head, body center portion, car body endpiece Profile is extremely important.

Overseas high speed train uses the smooth head with certain dullness mostly at present, to reduce air drag, such as：In State high ferro train CRH5, this kind of train can effectively reduce train pneumatic resistance, but when train speed further improves, air moves Mechanical property is deteriorated.

Utility model content

In view of this, the utility model provides a kind of ultrahigh speed pipeline train shape of low aerodynamic drag, outside the train Shape significantly reduces the air drag during train is run at high speed, and has smooth aerodynamic configuration and higher vehicle body volume.

A kind of ultrahigh speed pipeline train shape of low aerodynamic drag, the train shape is by car body first section profile, car body stage casing Profile and car body endpiece profile composition；

The arbitrary cross section of car body first section profile and car body endpiece profile in addition to summit is symmetrical gradual change Geometric profile, the arbitrary cross section of car body stage casing profile are symmetrical geometric profile, the geometry wheel of car body first section profile Exterior feature is made up of six curves, and the geometric profile of car body stage casing and car body endpiece profile is made up of five curves；

Have five points on the profile of car body stage casing cross section, respectively summit, on the left of car body a bit, one on the right side of car body Point and 2 points of vehicle bottom, on the left of summit to car body a little between be SPL section, in outer gibbosity, summit to the car body right side Side a little between be also SPL section, and two SPLs are tangent in car body top, be between 2 points of vehicle bottom Straightway, uses arc section transition between SPL section and straightway, arc section respectively with SPL section and straightway phase Cut；SPL segment length is 0.5~1D, and arc section radius is 0.01~0.25D, and D is car body stage casing cross section equivalent diameter, The angular range of circular arc is 30 °~90 °；

Midpoint, line side of the car body stage casing cross section along summit to the midpoint are determined on the straightway of the vehicle bottom To axisymmetricly, the generatrix direction of car body first section is that to be that starting point is done to head cusp A points with 6 points on the profile smooth SPL, curvature are gradually reduced to headstock direction, and six buses converge to head cusp A points, A points to car body top Vertical height is more than A points to the vertical height of vehicle bottom；

The bus in car body stage casing is the ratio of the straightway parallel with length over ends of body direction, length of straigh line and equivalent diameter D It is 8~20 to be worth scope；Wherein,D is car body stage casing cross section equivalent diameter；

The generatrix direction of car body endpiece be with 5 points on the profile be starting point rearwardly E points do Smoothing spline song Line, five buses converge to afterbody cusp E points, and E points and horizontal linear angle are 10 °~40 °；

The train shape is formed along each section of generatrix direction sweeping respectively by the cross section in car body stage casing, car body first section, car Body stage casing and car body endpiece smoothly transit.

Further, it to tailstock directional curvature is reduction-increase-reduction-increase change that the bus of the car body endpiece, which is, Smoothing spline curve.

Further, the Smoothing spline curve of the car body endpiece includes convex outer curve and inner concave curve, convex outer curve with Inner concave curve smoothly transits and extended to tailstock direction.

Further, in head cusp A point roundings, chamfering radius is between 10mm~200mm.

Further, in afterbody cusp E point roundings, chamfering radius is between 20mm~400mm.

Further, the length of car body first section, car body stage casing and car body endpiece using car body stage casing cross section equivalent diameter D as Reference design.

Beneficial effect：

1st, the utility model car body is tip fine stern profile, and is smoothly transitted using SPL with car body, car body section For special geometric figure, there can be smooth aerodynamic configuration on the basis of larger body volume, can significantly reduce Train run at high speed during air drag.

2nd, the bus of the utility model car body endpiece includes convex outer curve and inner concave curve, convex outer curve and inner concave curve light Slip over and cross and extend to tailstock direction, it is therefore an objective to ensure big cubical content in the case where meeting to reduce the requirement of resistance.

Brief description of the drawings

Fig. 1 is the utility model car body profile aerodynamic arrangement side view；

Fig. 2 is the utility model car body profile aerodynamic arrangement top view；

Fig. 3 is the utility model car body profile aerodynamic arrangement upward view；

Fig. 4 is the utility model car body stage casing cross-sectional structure schematic diagram；

Fig. 5 is the utility model car body head front view；

Fig. 6 is the utility model hull back rearview.

Embodiment

With reference to the accompanying drawings and examples, the utility model is described in detail.

A kind of ultrahigh speed pipeline train shape of low aerodynamic drag is present embodiments provided, as shown in Figure 1.The train shape It is divided into car body first section, car body stage casing and car body endpiece.

Car body first section, car body stage casing and car body endpiece arbitrary cross section are symmetrical plane geometric figure, car body The profile of first section cross section is made up of six curves, and the profile of car body stage casing and car body endpiece cross section is made up of five curves, As shown in Figure 2 and Figure 3.

As shown in figure 4, there is five points on the profile of car body stage casing cross section, a point D1 on the left of respectively summit B, car body, Two point C1 and C2 of a point D2 and vehicle bottom on the right side of car body, summit B to being SPL section between one point D1 of car body left side, Also it is SPL section between summit B to one point D2 of car body right side, and two SPLs are in car body top phase in outer gibbosity Cut, be that straightway is that C1C2 is straightway between 2 points of vehicle bottom, used between SPL section BD1 and straightway C1C2 Arc section transition, uses arc section transition between SPL section BD2 and straightway C1C2, arc section D1C1 and D2C2 respectively with SPL section and straightway are tangent；SPL section BD1, BD2 length is 0.5~1D, and arc section D1C1, D2C2 radius is 0.01~0.25D, D are car body stage casing cross section equivalent diameter, and the equivalent diameter of non-round is straight for the equal pipe of hydraulic radius Footpath, the angular range of circular arc is 30 °~90 °.

As shown in figure 5, straightway C1C2 midpoints are C points, along BC axisymmetricly, the generatrix direction of car body first section is for cross section Six Smoothing spline curves are done to head cusp A points, curvature is to car using six point B, D1, C1, C, C2, D2 on profile as starting point Head direction is gradually reduced, and six buses BA, D1A, C1A, CA, C2A, the D2A converge to head cusp A points, A points to car body top Vertical height be more than A points to vehicle bottom vertical height；In head cusp A point roundings, chamfering radius is in 10mm~200mm Between.

The bus in car body stage casing is the ratio of the straightway parallel with length over ends of body direction, length of straigh line and equivalent diameter D It is 8~20 to be worth scope；Wherein,

As shown in fig. 6, the generatrix direction of car body endpiece is by starting point of five point F, H2, G2, G1, H1 on profile to tail E points in portion do Smoothing spline curve, and curvature is that reduction-increase-reduction-increase changes to tailstock direction, five bus FE, H2E, G2E, G1E, H1E converge to afterbody cusp E points, and E points and horizontal linear angle are 10 °~40 °, in afterbody cusp E point roundings, fall Radius of circle is between 20mm~400mm.Smoothing spline curve FE, H2E, G2E, G1E, H1E include convex outer curve and interior concave curved Line, convex outer curve smoothly transit with inner concave curve and extended to tailstock direction.

Train shape is formed along each section of generatrix direction sweeping respectively by the cross section in car body stage casing, the profile of car body first section by The cross section in car body stage casing forms along curve BA, D1A, C1A, CA, C2A, D2A sweeping, and the profile in car body stage casing is by car body stage casing Cross section form along the straightway sweeping parallel with length over ends of body direction, the profile of car body endpiece by car body stage casing cross section Formed along curve FE, H2E, G2E, G1E, H1E sweeping, and car body first section, car body stage casing and car body endpiece smoothly transit.

The length of car body first section, car body stage casing and car body endpiece is designed on the basis of the equivalent diameter D of car body stage casing cross section. The length L of headstock₁=2D~6D, the length L of vehicle body₂=8D~20D, the length L of the tailstock₃=2D~6D.

The car body is tip fine stern profile, and is smoothly transitted with car body using SPL, and car body section is special several What figure, can be on the basis of larger body volume, and airflow smooth is by car body, so as to reduce gas-flow resistance.Imitated through numerical value True checking, the utility model proposes low aerodynamic drag the relatively domestic CRH5 of ultrahigh speed pipeline train shape aerodynamic arrangement at a high speed Train shape, car body zero hinder coefficient and reduce 30% (area of reference is body cross-sectional area), realize the outer of low aerodynamic drag Shape design object.

In summary, preferred embodiment of the present utility model is these are only, is not intended to limit of the present utility model Protection domain.All any modification, equivalent substitution and improvements within the spirit and principles of the utility model, made etc., all should be wrapped It is contained within the scope of protection of the utility model.

Claims

A kind of 1. ultrahigh speed pipeline train shape of low aerodynamic drag, it is characterised in that the train shape by car body first section profile, Car body stage casing profile and car body endpiece profile composition；

The arbitrary cross section of car body first section profile and car body endpiece profile in addition to summit is the geometry of symmetrical gradual change Profile, the arbitrary cross section of car body stage casing profile are symmetrical geometric profile, the geometric profile of car body first section profile by Six curve is formed, and the geometric profile of car body stage casing and car body endpiece profile is made up of five curves；

Have five points on the profile of car body stage casing cross section, respectively summit, on the left of car body a bit, on the right side of car body a little with And 2 points of vehicle bottom, summit be SPL section between on the left of car body a bit, in outer gibbosity, summit to car body right side one Also it is SPL section between point, and two SPLs are tangent in car body top, are straight line between 2 points of vehicle bottom Section, uses arc section transition between SPL section and straightway, arc section is tangent with SPL section and straightway respectively；Sample Bar curve segment length is 0.5~1D, and arc section radius is 0.01~0.25D, and D is car body stage casing cross section equivalent diameter, circular arc Angular range be 30 °~90 °；

Midpoint is determined on the straightway of the vehicle bottom, line direction of the car body stage casing cross section along summit to the midpoint is in Axial symmetry, it with 6 points on the profile is that starting point does Smoothing spline to head cusp A points that the generatrix direction of car body first section, which is, Curve, curvature are gradually reduced to headstock direction, and six buses converge to head cusp A points, the vertical height of A points to car body top More than the vertical height of A points to vehicle bottom；

The bus in car body stage casing is the ratio model of the straightway parallel with length over ends of body direction, length of straigh line and equivalent diameter D Enclose for 8~20；Wherein,

It with 5 points on the profile is that rearwardly E points do Smoothing spline curve to starting point that the generatrix direction of car body endpiece, which is, five Bar bus converges to afterbody cusp E points, and E points and horizontal linear angle are 10 °~40 °；

The train shape is formed along each section of generatrix direction sweeping respectively by the cross section in car body stage casing, in car body first section, car body Section and car body endpiece smoothly transit.
2. the ultrahigh speed pipeline train shape of low aerodynamic drag as claimed in claim 1, it is characterised in that the car body endpiece Bus be to the Smoothing spline curve that tailstock directional curvature is reduction-increase-reduction-increase change.
3. the ultrahigh speed pipeline train shape of low aerodynamic drag as claimed in claim 1, it is characterised in that the car body endpiece Smoothing spline curve include convex outer curve and inner concave curve, convex outer curve smoothly transits with inner concave curve and prolonged to tailstock direction Stretch.
4. the ultrahigh speed pipeline train shape of low aerodynamic drag as claimed in claim 1, it is characterised in that in head cusp A Point rounding, chamfering radius is between 10mm~200mm.
5. the ultrahigh speed pipeline train shape of low aerodynamic drag as claimed in claim 1, it is characterised in that in afterbody cusp E Point rounding, chamfering radius is between 20mm~400mm.
6. the ultrahigh speed pipeline train shape of low aerodynamic drag as claimed in claim 1, it is characterised in that car body first section, car The length of body stage casing and car body endpiece is designed on the basis of the cross section equivalent diameter D of car body stage casing.