i****x
发帖数: 17565 | 1 看到这么个东西，贴一下，Cd这东西还真不能靠眼睛看。谁能想到一个扁平流线的跑车
，Cd比方盒子轿车能大将近一倍？！
TVR 3000S 0.43
Lexus LS 430 0.25
Cd Automobile Year
0.195 General Motors EV1 1996
0.212 Tatra T77A 1935[71]
[72] [73] [74]
0.24 Tesla Model S 2012[68]
0.2455 Tatra 77 1933[67]
0.25 Peugeot 508 2011-present
0.25 Lexus LS 430 2001–2006
(with air suspension)
0.25 Audi A2 1.2 TDI 2001
0.25 Honda Insight 1999-2006
0.25 Hyundai Sonata Hybrid 2013
0.25 Toyota Prius 2010
0.26 BMW E90 (0.26-0.30) 2009[65]
0.26 Lexus LS 430 2001–2006
(without air suspension)
0.26 Lexus LS 460 2006
0.26 Mazda3 (Sedan) 2012[66]
0.26 Mercedes-Benz B-Class + eco-package 2012-
0.26 Mercedes-Benz E-Class 2002-2009
0.26 Mercedes-Benz W221 S-Class 2006-present
0.26 Nissan GT-R 2010–present
0.26 Opel Calibra 1989
(8 valve version)
0.26 Toyota Prius 2004–2009
0.26 Citroen SM 1970
0.27 Audi A2 1.6 FSI 2003
0.27 Honda Civic Hybrid 2006-
0.27 Hyundai Genesis 2009
0.27 Infiniti G35 Coupe 2003–2007
(0.26 with "aero package")
0.27 Lexus GS 2005
0.27 Mazda6 2009
0.27 Mazda6 (sedan and hatchback)[64] 2008
0.27 Mercedes-Benz W203 C-Class Sedan 2001
0.27 Mercedes-Benz S Class 2000–2005
(0.268 with Sport Package)
0.27 Nissan GT-R 2007–2010
0.27 Opel Insignia 2008–present
(0.26 in EcoFlex trim)
0.27 Toyota Camry Hybrid 2007
0.27 Tucker Torpedo 1948
0.27 Volkswagen Passat B5 (sedan) 1997
0.28 Audi A2 1.4 TDI 2000
0.28 Citroën C4 2004
0.28 Citroën XM 1989
0.28 Honda Civic Hybrid 2003-2005[13]
0.28 Hyundai Elantra 2011
0.28 Hyundai Sonata 2011-2013
(0.25 for the Hybrid)
0.28 Lexus IS 2006–present
0.28 Lexus LS400 1998
0.28 Luxgen5 Sedan 2011
0.28 Mazda3 (Hatchback) 2012
0.28 Mitsubishi Diamante 1995
0.28 Nissan Leaf 2011
0.28 Opel Astra F 1991
0.28 Opel Omega A 1986
0.28 Porsche 997 Carrera 2004
(with optional automatic spoiler, PDK transmission 0.30)
0.28 Renault 25 TS 1984
0.28 Rumpler Tropfenwagen 1921
0.28 Saab 9-3 2003
0.28 Toyota Camry / Lexus ES 2001
0.281 Chevrolet Volt 2010
0.284 Volkswagen Passat CC 2008-present
0.286 Chevrolet Corvette C6 2006
0.288 Chrysler Concorde 1998–2001
0.29 Alfa Romeo 155 1992[59]
0.29 Acura TL 2004-2008
0.29 Audi 80 1991
0.29 Audi A4/S4 2011-present
0.29 BMW 1-Series (116i Sportshatch) 2008
0.29 BMW 8-Series 1989-1999
0.29 Chevrolet Corvette 2005
0.29 Chevrolet Corvette C5 Z06 2002
0.29 Daewoo Espero 1990
0.29 Dodge Charger Daytona 1969
0.29 Eagle Talon 1990s
0.29 Ford Escape 2010[60]
0.29 Ford Focus C-Max 2003[61]
0.29 Honda Accord Coupe 2003, 2005–2007
0.29 Honda Accord Hybrid 2005, 2007
0.29 Honda CRX HF[56] 1988
0.29 Infiniti G35 Sedan 2008
0.29 Lancia Dedra 1990
0.29 Lexus CT 200h 2011-present
0.29 Lexus LS 400 1990
0.29 Lotus Elite 1958
0.29 Lotus Europa 1966
0.29 Mazda Millenia 1995
0.29 Mazda RX-7 FC3S Aero Package 1986
0.29 Mazda RX-7 FD 1993
0.29 Mazda3 2010
0.29 Mercedes-Benz SL(Roof Up) 2001-present
0.29 Mercedes-Benz C-Class Sportscoupe 2001
0.29 Nissan 350Z Coupe Track and Grand Touring 2007–2008
0.29 Nissan Versa 2007–2008
0.29 Peugeot 208 2012
0.29 Peugeot 308 2007-present
0.29 Peugeot 407 2004-2011
0.29 Peugeot 607 2000-2010
0.29 Pontiac Firebird Trans Am 1984
(with optional W62 Aero Package and N89 Turbo Cast rims)
0.29 Porsche Boxster 2005-present
0.29 Subaru SVX 1992
0.29 Toyota Camry 1996–2001
0.29 Toyota Echo 2000-2005[62][63]
0.29 Toyota Prius 2001
0.29 Toyota Yaris 2006-2011
0.29 Volvo 850 T-5R sedan 1995
0.29 Volvo C70 2000
0.291 Toyota Avalon 2005
0.295 Ford Falcon 1998
0.3 Alfa Romeo 164Sedan 1988[53]
0.3 Audi 100 1983
0.3 Ford Taurus 1996-1999[54][55]
0.3 Honda Accord Sedan 2003, 2005–2007
0.3 Honda CRX DX/Si[56] 1988
0.3 Honda NSX 2002
0.3 Honda Odyssey 2005
0.3 Hyundai Sonata 2006
0.3 Koenigsegg CCX 2006
0.3 Mitsubishi Eclipse 2000
0.3 Nissan 180SX 1989
0.3 Nissan 300ZX 1983
0.3 Nissan 350Z Coupe Base and Enthusiast models 2003–2008
0.3 Nissan 370Z Coupe 2009[57]
(0.29 with sport package)
0.3 Renault 19 16V 1991
0.3 Saab 92 1947
0.3 Toyota Corolla 2003-2008[58]
0.3 Toyota Sienna 2003–2009
0.304 Ford Probe 1988-1992[52]
0.31 Audi A4 B5 1995
0.31 Audi A5/S5 2011-present
0.31 BMW 7-series 2009
0.31 Buick Park Avenue 1996
0.31 Cadillac CTS 2004
0.31 Cadillac CTS-V 2005
0.31 Citroën AX 1986
0.31 Citroën GS 1970
0.31 Eagle Vision 1995
0.31 Fiat Coupé 1995[46]
0.31 Ford Falcon 1995
0.31 Ford Thunderbird 1989-1997[47]
0.31 Holden Commodore 1998
0.31 Honda Civic(Hatchback) 1992-1995[13]
0.31 Honda Civic (Sedan) 2006
0.31 Infiniti G37 (Coupe) 2008-present[48]
0.31 Kia Rio (Sedan) 2001[49]
0.31 Lamborghini Diablo 1990
0.31 Lexus LFA 2010
(wing retracted)
0.31 Mazda MX-6 1992–1997
0.31 Mazda RX-7 FC3S 1986
0.31 Mazda RX-7 FD R1(R2) 1993
0.31 Mazda RX-8 2004
0.31 Mazda3 (Hatchback) 2010
0.31 Nissan Tiida / Versa 2004
0.31 Peugeot 307 2001
0.31 Peugeot 405 1987
0.31 Porsche 997Turbo/GT3 2006
0.31 Renault 25 1984
0.31 Saab Sonett III 1970
0.31 Saturn SC2 2001
0.31 Scion xA 2004
0.31 Toyota Avalon 1995–2000
0.31 Toyota Corolla 1998-2002[50]
0.31 Toyota Paseo 1995-1999[51]
0.31 Toyota RAV4 2006
0.31 Toyota Supra (N/A; without factory wing) 1993
0.31 Volkswagen GTI Mk IV 1997
0.31 Volvo S40 2nd generation 2003
0.315 Saturn SL1 1996-1999[45]
0.32 AMC Pacer 1975–1980
0.32 Buick Riviera 1995
0.32 BMW M3 Coupe 2005
0.32 Dodge Avenger 1995
0.32 Ferrari California 2008
0.32 Ford Taurus 1992-1995[36]
0.32 Geo Metro (Sedan) 1995-1997[13]
0.32 Honda Accord (Coupe) 2002
0.32 Honda Civic (Coupe) 1992-1995[13]
0.32 Honda Civic (Hatchback DX) 1996-2000[37]
0.32 Honda Civic (Sedan EX) 1996-2000[38]
0.32 Honda Insight Hybrid [39] 2009-
0.32 Honda NSX 1990
0.32 Jaguar XJ (X350) 2006
0.32 Koenigsegg CCX 2006
0.32 Mazdaspeed3 2007
0.32 McLaren F1 1992
0.32 Mercedes-Benz 190E 2.5-16/2.3-16
0.32 Nissan 240SX Coupe 1995-1998[40]
0.32 Nissan 300ZX 1989
0.32 Nissan Altima 1998-2001[41]
0.32 Nissan Maxima 1997
0.32 Porsche 997 GT2 2008–present
0.32 Peugeot 406 1995
0.32 Peugeot 806 1994
0.32 Scion xB 2008
0.32 Suzuki Swift 1991
0.32 Tatra 600 1948-1952[42]
0.32 Toyota Celica 1994
0.32 Toyota Celica 2000-2005[43]
0.32 Toyota Supra (N/A with wing and turbo models) 1993
0.32 Toyota Supra (with factory turbo wing) 1987–1988
0.32 Toyota Tercel Sedan 1995-2000[44]
0.32 Volkswagen Golf Mk3 1991
0.32 Volkswagen GTI Mk V 2006
0.32 Volvo V50 2004
0.321 Toyota Matrix 2003-2008[35]
0.324 Cobalt SS Supercharged 2005
0.329 Chevrolet Corsica 1989-2006[34]
0.33 Acura Integra 1993-2001[28]
0.33 Alfa Romeo Giulia (saloon) 1962[29]
0.33 Audi A3 2006
0.33 Dodge Charger 2006
0.33 Ford Crown Victoria 1992
0.33 Ford Escort ZX2 1998-2003[30]
0.33 Ford Fusion 2010[31]
0.33 Honda Accord Sedan 2002
0.33 Honda Civic Hatchback 1988-1991[13]
0.33 Lamborghini Murcielago 2001
0.33 Lexus RX 2010
0.33 Mazda RX-7 FC3C 1987
0.33 Nissan 200SX Coupe 1995-1998[32]
0.33 Peugeot 206 1998
0.33 Peugeot 309 1986
0.33 Renault Modus 2004
0.33 Subaru Impreza WRX STi 2004
0.33 Saturn SL2 1999[33]
0.33 Toyota Corolla 1993-1997[13]
0.33 Toyota Supra (without wing) 1989–1990
0.33 to 0.37 Koenigsegg Agera (R) 2013
0.338 Chevrolet Camaro 1995
0.34 Aston Martin DB9 2004
0.34 Chevrolet Caprice 1994
0.34 Chevrolet C6 Corvette Z06 2005–present
0.34 Chevrolet Tahoe hybrid 2008
0.34 Ferrari 360 Modena 1999
0.34 Ferrari F40 1987
0.34 Ferrari F430 F1 2004
0.34 Ford Puma 1997
0.34 Ford Sierra 1982
0.34 Geo Metro (Hatchback) 1995-1997[13]
0.34 Honda Prelude 1988
0.34 Mercedes-Benz SL (Roof Down) 2001
0.34 Nissan Altima 1993-1997[23]
0.34 Peugeot 106 1991
0.34 Saturn SL2 1991-1995[24]
0.34 Subaru Impreza WRX (4 Door) 2009[25]
0.34 Subaru Legacy Wagon 1993-1999[26]
0.34 Toyota Corolla (Wagon) 1993-1997[27]
0.34 Toyota Supra (with factory 3 piece turbo wing) 1989–1990
0.342 Toyota Celica (Liftback Model) 1982
0.348 Toyota Celica Supra (Mk 2) 1982[22]
0.35 Aleko 2141 1986-2002
0.35 Aston Martin Vanquish 2004
0.35 BMW M3 Convertible 2005
0.35 BMW Z4 M coupe 2006
0.35 Dodge Viper GTS 1996
0.35 Honda Del Sol 1992–1997[13]
0.35 Jaguar XKR 2005
0.35 Lexus GX 2010
0.35 Lexus RX 2003–2009
0.35 MINI Cooper 2008
0.35 Nissan Cube 2009
0.35 Renault Clio (Mk 2) 2002[18]
0.35 SSC Ultimate Aero 2007–present
0.35 Tesla Roadster[19] 2008
0.35 Toyota MR-2 1998
0.35 Toyota Previa 1991-1997[20][21]
0.35 Toyota Sequoia 2007
0.35 Volvo 940 (sedan) 1990
0.355 NSU Ro 80 1967
0.36 Alfa Romeo 33 1983[12]
0.36 Cadillac Escalade hybrid 2008
0.36 Cadillac Fleetwood 1996
0.36 Citroën CX (named after the term for Cd) 1974
0.36 Citroën DS 1955
0.36 Chrysler Sebring 1996
0.36 Ferrari Testarossa 1986
0.36 Ford Escort 1997-2002[13]
0.36 Ford Mustang 1999
0.36 Honda Civic 2001–2005
0.36 Nash Airflyte 1949-1951
0.36 Opel GT 1969
0.36 Subaru Impreza WRX[14] 2010
0.36 Saturn SW 1996-2001[13]
0.36 Toyota Celica Convertible 1994-1999[16]
0.36 Volkswagen Jetta 1985-1992[17]
0.36 Tatra 87 1936-1950[15]
0.37 Ford Escort Mk.III (Europe) 1980
0.37 BMW Z3 M coupe 1999
0.37 Jaguar XJ (X300/X308)
0.37 Renault Twingo
0.37 Volkswagen Tiguan 2008
0.372 Ferrari F50 1996
0.374 Ford Capri Mk III 1978
0.38 Lexus GX 2003
0.38 Mazda Miata 1989
0.38 Fiat 500 1957
0.38 Smart ForTwo 1998
0.38 Smart Roadster Coupé 2003
0.38 Subaru Forester 2009[9]
0.38 VW NewBeetle[10] 2003
without wing or spoiler 0.39[11]
0.385 Nissan 280ZX 1978
0.39 Chevrolet Tahoe 2006
0.39 Dodge Durango 2004
0.39 Ford Aerostar 1995[7]
0.39 Ford Escort 5 Door 1981-1984[8]
0.39 Honda Odyssey 1994-98
0.39 Triumph Spitfire 1964
0.4 Jaguar XJS 1976-1996
0.4 Chevrolet Astro 1995-2005[6]
0.4 Ford Escape Hybrid 2005
0.4 Nissan Skyline GT-R R32 1989
0.405 Subaru Forester 1997-2002[5]
0.41 Smart Roadster 2003
0.41 Volvo 740 (sedan) 1982
0.42 Lamborghini Countach 1974
0.42 Plymouth Duster 1994
0.42 Triumph Spitfire Mk IV 1971
0.425 Duple 425 coach 1985
(named for its low Cd by coach standards)
0.43 TVR 3000S 1978-79
0.44 Volkswagen Vanagon 1980-1991
0.44 Ford Mustang (fastback) 1979
0.44 Peugeot 305 1978
0.44 Peugeot 504 1968
0.44 Toyota Truck 1990
0.45 Dodge Viper RT/10 1996
0.45 Range Rover Classic 1990
0.46 Ford Mustang (coupe) 1979
0.47 Lancia Aprilia[4] 1937
0.48 Rover Mini 1998
0.48 Volkswagen Beetle (original design)[1][2] 1938
0.48 Volkswagen Cabriolet (Rabbit Convertible)[3] 1979–1993
0.51 Volkswagen Westfalia Camper 1980-1991
0.51 Citroën 2CV 1948
0.54 Mercedes Benz G-Class
0.57 Hummer H2 2003
0.6 a typical truck
0.65 Lotus Seven 1957–1972
0.7 Caterham Seven
|
D*****I
发帖数: 8268 | 2 dude..30年前形状靠手算的好不好
现在都CAE算的。。。
2000年初PC cpu也才1.xGHz呢，现在手机cpu就1.xGHz了
就你那个扁平流线的跑车两个车灯就要多少空阻呢
贴数据是好事。。评论就哗众取宠了吧
【在 i****x 的大作中提到】
: 看到这么个东西，贴一下，Cd这东西还真不能靠眼睛看。谁能想到一个扁平流线的跑车
: ，Cd比方盒子轿车能大将近一倍？！
: TVR 3000S 0.43
: Lexus LS 430 0.25
: Cd Automobile Year
: 0.195 General Motors EV1 1996
: 0.212 Tatra T77A 1935[71]
: [72] [73] [74]
: 0.24 Tesla Model S 2012[68]
: 0.2455 Tatra 77 1933[67]
|
p*********e
发帖数: 32207 | 3 需要注意的是cd只是风阻系数,乘上迎风投影面积才是等效迎风面积
从这点上看其实跑车因为车身低矮,投影面积本身就小,所以反而风阻系数偏高
另外一点就是很多跑车需要空气动力方面的贡献提供额外的抓地力,
而这个同时意味着需要更大的等效迎风面积,
一来一去,风阻系数就大起来了
大房车因为静音方面的需求,反而需要风阻小一些.
【在 i****x 的大作中提到】
: 看到这么个东西，贴一下，Cd这东西还真不能靠眼睛看。谁能想到一个扁平流线的跑车
: ，Cd比方盒子轿车能大将近一倍？！
: TVR 3000S 0.43
: Lexus LS 430 0.25
: Cd Automobile Year
: 0.195 General Motors EV1 1996
: 0.212 Tatra T77A 1935[71]
: [72] [73] [74]
: 0.24 Tesla Model S 2012[68]
: 0.2455 Tatra 77 1933[67]
|
c*********r
发帖数: 19468 | 4 没什么想不到，跑车风阻系数高在俱乐部算是常识吧，讨论过很多次了……
【在 i****x 的大作中提到】
: 看到这么个东西，贴一下，Cd这东西还真不能靠眼睛看。谁能想到一个扁平流线的跑车
: ，Cd比方盒子轿车能大将近一倍？！
: TVR 3000S 0.43
: Lexus LS 430 0.25
: Cd Automobile Year
: 0.195 General Motors EV1 1996
: 0.212 Tatra T77A 1935[71]
: [72] [73] [74]
: 0.24 Tesla Model S 2012[68]
: 0.2455 Tatra 77 1933[67]
|
a********2
发帖数: 2561 | |
i****x
发帖数: 17565 | 6 哗众取宠说过了吧。。。无非是找个比较counterintuitive的话题而已
【在 D*****I 的大作中提到】
: dude..30年前形状靠手算的好不好
: 现在都CAE算的。。。
: 2000年初PC cpu也才1.xGHz呢，现在手机cpu就1.xGHz了
: 就你那个扁平流线的跑车两个车灯就要多少空阻呢
: 贴数据是好事。。评论就哗众取宠了吧
|
i****x
发帖数: 17565 | 7 Cd是无量纲，不应该跟横截面积有直接联系吧。
这么说吧，一辆车的完美1/2模型，测出Cd是否应该跟真车完全相同呢？
【在 p*********e 的大作中提到】
: 需要注意的是cd只是风阻系数,乘上迎风投影面积才是等效迎风面积
: 从这点上看其实跑车因为车身低矮,投影面积本身就小,所以反而风阻系数偏高
: 另外一点就是很多跑车需要空气动力方面的贡献提供额外的抓地力,
: 而这个同时意味着需要更大的等效迎风面积,
: 一来一去,风阻系数就大起来了
: 大房车因为静音方面的需求,反而需要风阻小一些.
|
D*****I
发帖数: 8268 | 8 这个一点都不counter engineering intuitive。。。
【在 i****x 的大作中提到】
: 哗众取宠说过了吧。。。无非是找个比较counterintuitive的话题而已
|
