PUSAN NATIONAL UNIVERSITY DEPARTMENT OF NAVAL ARCHITECTURE AND

PUSAN NATIONAL UNIVERSITY DEPARTMENT OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING 프로펠러 기하학 PROPULSOR SYSTEM LAB. 김 문찬 Thursday, February 25, 2021 1

2 날개 단면 용어 t. O/2 Fig 1. General definition of a propeller blade section § § § § Propeller blade section Leading edge Trailing edge Chord line Mean line Thickness Camber Blade section reference point ※ 대표단면 : Troost (Netherlands), MAU/PAI (Japan), NACA (USA), KH (Korea) P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN

대표 날개 단면 비교 (MAU vs NACA) 3 x/C Fig 2. Definition of MAU section x/C Fig 3. Definition of NACA section Mean Line Chord Line Camber Blade Section reference point P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN

4 프로펠러 기본 용어 프로펠러 기준선 앞날 y 제작 선 기준 날 뒷 면 력 압 x(하류방향) § § § § 흡 입 면 Blade outline Propeller reference line Generator line Leading edge Trailing edge Suction side Pressure side Z (좌현방향) Fig 4. Definition of basic propeller geometry (Ⅰ) P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN

5 프로펠러 기본 용어 Diameter Hub § § § § Diameter, D Hub, d. H Pitch, P Pitch angle, ф Rake, x. G Skew, θm Blade thickness, t. O § § § Pitch ratio, P/D Hub ratio, d. H/D Blade thickness ratio, t. O/D Fig 5. Definition of basic propeller geometry (Ⅱ) P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN

6 프로펠러 기본 용어 P ф P P=2πrtanф , ф=tan-1 ㅡㅡ 2 πr § § § § Diameter, D Hub, d. H Pitch, P Pitch angle, ф Rake, x. G Skew, θm Blade thickness, t. O § § § Pitch ratio, P/D Hub ratio, d. H/D Blade thickness ratio, t. O/D Fig 6. Definition of basic propeller geometry (Ⅲ) P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN

7 프로펠러 기본 용어 § § § § Diameter, D Hub, d. H Pitch, P Pitch angle, ф Rake, x. G Blade thickness, t. O Skew, θm § § § Pitch ratio, P/D Hub ratio, d. H/D Blade thickness ratio, t. O/D Fig 7. Definition of basic propeller geometry (Ⅳ) P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN

8 프로펠러 기본 용어 § § § § Diameter, D Hub, d. H Pitch, P Pitch angle, ф Rake, x. G Blade thickness, t. O Skew, θm § § § Pitch ratio, P/D Hub ratio, d. H/D Blade thickness ratio, t. O/D Fig 8. Definition of basic propeller geometry (Ⅴ) P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN

9 프로펠러 기본 용어 § § § Swept outline Projected outline Expanded outline Fig 9. Definition of basic propeller geometry (Ⅵ) P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN

10 수식을 이용한 날개 형상 표현 각 반경에 대한 날개 윤곽선 좌표 xl, t = x. G + rθmtanф ± θl, t = θm ± § c ㅡㅡ cosф 2 r c ㅡ sinф 2 r line e l el ce p n o Pr fere re Propeller Plan Rake yl, t = rcosθl, t zl, t = rsinθl, t ine l ch Pit Skew induced rake Mid chord r to ra ne Ge w Ske e lin Aft Fig 10. Propeller geometry in x-rθ coordinate (Ⅰ) P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN

12 수식을 이용한 날개 형상 표현 프로펠러 날개 상의 임의 점에 대한 축방향 좌표 계산 예 1 x± = x. G + rθmtanф + c(s- ㅡ )sinф – fcosф 2 ± § t ㅡ cosψ 2 Fig 11. Propeller geometry in x-rθ coordinate (Ⅱ) P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN

프로펠러 도면 예 (MAU) 13 P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN

프로펠러 도면 예 (NACA 66) 14 P U S AN N ATI O N AL U N I VE R S I TY D E P AR TME N T O F N AVAL AR C H I TE C TU R E AN D O C E AN E N G I N E E R I N G P R O F. KI M, MO O N C H AN