Двигательная установка. LE-7A. [Редактировать]

LE-7A это обновленная версия двигателя LE-7. Основной дизайн остался неизменным. Модификация 7A была произведена с целью упрощения процесса производства и сборки. Кроме этого, реконструкция двигателя была произведена с целью его адаптации к использованию на ракетах серии H2A.

Изменения по сравнению с базовой версией:

  • снижение объемов сварочных работ за счет изменения конструкции магистралей (снижение свариваемых элементов с 935 до 458, а частей со 166 до 99);
  • изменение топливного и окислительного индукторов;
  • сокращение числа деталей в инжекторе;
  • уменьшение размера камеры сгорания (снижение числа элементов с 452 до 295, а числа сварных деталей с 209 до 24);
  • понижение импульса, по сравнению с базовой версией.

 

Технические характеристики

#ХарактеристикаЗначение
1Длина, мм3660
2Топливоводород
3Максимальный диаметр, мм1815
4Тяга, тс110
5Удельный импульс, секунд441
6Масса, кг1740
7Окислителькислород
8Давление (в основной камере сгорания), кгс/см в кв.121
9Давление (в ГГ), кгс/см в кв.214
10Соотношение компонентов6.0:1
11Частота вращения (вала насоса горючего), оборотов в минуту41270
12Частота вращения (вала насоса окислителя), оборотов в минуту18040
13Максимальное время (работы в составе РН), секунд600
14Степень расширения сопла, раз54
15Дроссель, процентов70

Экономические характеристики

#ХарактеристикаДата измеренияЗначение
1Стоимость (двигателя), млн. долл.10

Найдено 1000 документов по запросу «LE-7A». [Перейти к поиску]


Дата загрузки: 2017-05-21
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0.05/5
... core stage powered by a single LE-7A engine, two large liquid rocket... first stage powered by two LE-7A engines and supplemented by four... a second stage powered by an LE-5B engine. H-IIA 202 There... (355,198) 137 (30,799) LE-7A -- -- LE-5B Engine manufacturer Mitsubishi -- -- Mitsubishi... XM 4 Sea Launch 6 5 8 DM1 Hotbird 7A Ariane 5 DM2 Galaxy 17 Ariane...



Дата загрузки: 2017-03-18
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0.19/5
... oxygen tank 2nd stage engine (LE-5B) 1st stage liquid oxygen... (SRB-A x 4 units) 15m リフトオフ 1st stage engine (LE-7A x 2 units) H-IIB Launch Vehicle *This... performed by the second stage LE-5B-2 engine idle mode combustion... Electronics NEC ・LE-7A turbopump ・Solid rocket booster ・Payload Faring ・GCC ・LE-5B turbopump... welding). Clustered first stage engine (LE-7A) ・Two engines are clustered for... oxygen tank 2nd stage engine (LE-5B) 1st stage liquid oxygen... 12 m/12 m 4m 16.7 tons LE-5B 137 KN 448 seconds....7 tons LE-5B 137 KN 448 seconds 5.2 m about 176 tons LE-7A x 2 1098 KN×2 440 seconds 4m About 100 tons LE-7A x 1 1098... hydrogen tank 15m 1st stage engine (LE-7A x 2) H-IIB Launch Vehicle SRB-A Propellant...)) CFT/ GTV L / O Thick wall tank LE-7A engine Combustion gas L/V side HTV... Payload fairing C B D SRB-A 1st pair LE-5B Engine 2nd stage A SRB...



Дата загрузки: 2017-02-23
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0.04/5
...* 1 The first-stage LE-7A and second-stage LE-5B engines of the..., with the LE-5B development completed in 2000, the LE-7A development is... the second-stage engine, the LE-5A, failed and in the... the first-stage engine, the LE-7, failed. Development of these engines... of the LE-7A engine, an improved model of the LE-7, was started... same year, development of the LE-5B engine, an improved model of the LE-5A, was also started mainly... the five units of the LE-5B engine and the development... Ishikawajima-Harima Heavy Industries Fig. 1 LE-7A engine *1 Nagoya Guidance & Propulsion Systems... 2.1 The LE-7A engine Fig Fig.. 1 shows a picture of the LE-7A engine. This engine has been developed by improving the LE... the H-II launch vehicle. The LE-7A engine operates on the same... cycle) as that of the LE-7 but has higher reliability, lower... in the later stage. 2.2 The LE-5B engine Fig Fig.. 2 shows a picture of the LE-5B engine. The LE-5B engine has been developed by increasing the Fig. 2 LE-5B engine Mitsubishi Heavy Industries... from 12.4 tons of the LE-5A. A change of engine cycle... project 3.1 The LE-7A engine Ta b l e 1 s h o w s t h e L E - 7 A e n g i n e d e v e l o p m e n t schedule. Development of the LE-7A engine was... which were conducted on the LE-7 engine to confirm applicability of... for the development of the LE-7A engine. The designing work for... the development of the LE-7 engine, because the LE-7 engine took almost... of the first stage engine LE-7 during flight. The problem engine... for the development of the LE-7A engine. The launching operation of... LE-7 engine of the H-II launch vehicle. The development of the LE-7A.... 7 qualification engine in 2002. 3.2 The LE-5B engine T a b l e 2 s h ow s t h e L E - 5B en... schedule. The development of the LE-5B engine was started in 1994. In 1955, an LE-5A engine, which was used... the injector designed for the LE-5B engine and the combustion... the combustion chamber of the LE-5A engine caused an external... trouble would happen to the LE-5B engine, and accordingly no... taken against it, because the LE-5B engine had already employed... to finish development of the LE-5B engine when the phase..., there was a possibility that the LE-5B engine might experience a restart... in the operation of the LE-5A engine. On reflection, it... of No. 8 H-II vehicle. The LE-5B engine was installed on... the LE-7A engine, all problems revealed in the development of the LE... the schedule for improvement. The LE-5B engine has passed the... et al., Development of Improved LE-7, Mitsubishi Juko Giho Vol.33... of H-IIA Rocket Engine (LE7A, LE-5B), Mitsubishi Juko Giho Vol....5 (1998) p.344 (3) Kakuma, Y. et al., LE-5B Engine Development, AIAA-20003775...



Дата загрузки: 2017-02-23
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0.15/5
... in the development of the LE-7A engine and was contributed to... the development of LE-7, the former rocket engine of LE-7A. He is.... Matsuyama, explain the LE-7A rocket engine No.4: The LE-5B engine for... it to success. From LE-7 to LE-7A The development of rocket engines... sacrifices. To develop the LE-7, former engine of LE-7A, it required total... yen. Thereupon, H-IIA rocket and LE-7A engine, which should be economically... to develop. Development of LE-5B, LE-7A The data that gave settle... of LE-7 and should reflect to the development work of LE-7A became... 260 places in LE-7 to 60 places in LE-7A. SPACE JAPAN REVIEW... 4 Also from the experience of LE-7, find and diet the unnecessary... began the development work of LE-7A; the first burn out test... performance for HII-A) engine LE-5B LE-7A thrust 14 ton 109.5 ton... fleasibity The development of the LE-7A engines of H-IIA Rocket No... with each manufacture to inspect. LE-7A engine that was produced as.... No.6: Compares of 6: LE-7A (the left) and LE-7 engine explained by Mr... for the 1st stage engine (LE-7A), Mr. Matsuyama said. The modification.... 8-1: The nozzle skirt of the LE-7A engine SPACE JAPAN REVIEW, No.... 8-2: The nozzle skirt of the LE-5B engine The rocket is...



Дата загрузки: 2016-08-10
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0.23/5
H A H A 1 H A H A H H H A A H H 3 A A H A H A H A H 8 H H A A 5 H A H H A H A H H A H A A H H H A A H H H A A A 1 H A H A H H H A 2 SSB H A MDS-1 DASH H LE-7A LE-7A 3.7 2 4.6 H H LE-7A SRB-A SRB-A LE-5B LE-5B 3 LE-5B NASDA H H A 4 LE-5B LE LE 5B 7A SRB-A LE 7A SRB H H A H A FMEA 5 LE-7A LE-5B SRB-A H FMEA FMEA end-to-end 6 H A NASDA/ NASDA H A H 7 H III H A SRB-A 8 H H A A LE-7A OTP LE-5B SRB-A H A 9 H A H H H H A A H H A A H 10 A A H H H A A (GTO) 1 2 LE-5B H H A 2 LE-5A LE-7 1 LE-5B LE-7A SRB-A LE-7A 11 km LE-7 LE-7A LE-5B LE-5A km km = 1080 kN = 445.6 s LE-7A =1073 = 429 30kN 4.7s LE-7A = 122 kN = 452 s LE-5B = 137 = 447 3.7kN 4.8s LE-5B 12 = 1047 1066 kN = 430 s = 134 135 kN = 448 s Built In Test Built In Test 13 14 o-p o-p ( 15 ) 16 17 NPSH(Net Positive Suction Head) 18 H- H- H- H- H- HH- H- H A (1) (2) (3) (4) 3 3 5 8 1 7 5 0 0 1 1 0 0 0 0 H- A H- (1) 2 1 (2) 8 6 4 1 5 5 3 0 0 2 1 LE-5B Built-in-Test 20 43 (1) (2) (3) (1) 5 4 7 6 5 3 4 0 0 1 0 FMEA FMEA (2) (3) LE-7A LE-5B SRB-A 5 6 0 4 5 0 (1) H(2) H- A 8 3 0 3 0 (1) (2) (3) H- A H- 4 H- H- 4 7 0 0 6 1 H- A B C H- 8 D E F (1) (2) (3) (4) (1) (2) (3) (4) (5) (6) (7) (1) (2) (Failure Modes and Effects Analyses: (Fault Tree Analyses Analyses: ) ) ) (Probabilistic Risk (3) (4) (1) (2) (3) (4) (5) (6) (7) (1) (2) (3) (4) NASDA (1) (2) l l l l l (Failure Modes and Effects Analyses: (Fault Tree Analyses Analyses: ) ) ) (Probabilistic Risk (3) (4) H 8 H A ( ) 1. 2. 3. 4. 1. 2. NASDA NASDA 1. 2. H-IIA 1. 2. Failure Modes and Effects Analyses) 1. 2. 1. 2. 3. 1. 2. 3. 1. NASDA 2. SRB-A SRB-A 1. 2. 3. SRB-A SRB-A 1/4 SRB-A SRB-A SRB-A SRB-A H-IIA SRB-A 1. 2. 3. 1. 2. 1 0.9deg/s 0.05deg/s 1. 2. -0.25 0.25deg/s 3deg/s SRB-A 1. 2. 2 SRB-A SRB-A SRB-A FTP 0.067 0.08 55.6 6.49 90 7.14 NPSH NPSH153m 235m NPSH 80m 1.2 9 2040 10 1900 NPSH NPSH FTP 0.028 LE-7A LE-7A 1. 2. 3. OTP NPSH(33.7m) 10m LE-7 OTP OTP SRB 33.7m NPSH 43.5m 1. 2. / LE-7A Restricted Shock Separation l l ü ü LE-7A 1. 2. LE-7A LE-7A NAL,ISAS FTP / NPSH 1. 2. 28 NAL/NASDA 3,647 run-to-run 1. 2. 3. 55,000rpm 69,000rpm . OTP FTP NPSH NPSH FMEA 4mm H A



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0.2/5
MHI No.1: MHI H-IIA LRE 36186.2km) AIAA JFSC 36190.6km( 251.3km( 251.3km) LE-7A 1 0.1 No.2: 1983 LE-7A LE-7 H-IIA H-II H-II/F#5 , H-II/F#8 H-IIA H-II TO GTO 7 2 No.3 : LE-7A No.4: HII-A LE-5B 3 H-IIA H-IIA 8 25 29 13 LE-7 00 16 00 LE-7A H-IIA LE-7A LE-7 16 3 500 180 90K C, 140 180 H-II 12 1994 H-II H-IIA LE-7A LE-5B, LE-7A LE-7 LE-7A CAD LE-7 LE-7 260 6 4 LE-7 No. 5 : HII-A 12 H-2A1 LE-7A 1 10 13 2 11 12 H-2A1 H-2A 1 LE-7A 13 5 1 NASDA/MHI ECS No. 6: LE-7A( ) 1 Ka-Band TWT LE-7 8 6 31 20 MU-300 MU-300 21 9 23 24 3 30 6 25 1 No.7 :2 LE-7A 0.5mm 7 2 / 109.5 112 250 No. -1 : LE-7A 8 3,000 No.8-2 : LE-5B 30 H-IIA 10 53m H-IIA 285 NASDA MHI H-IIA LRE 9 No. : H-IIA No.10 :HII-A 10 MHI ( ) H-2A No.11: He She ”He” Hero” She” She ”She” She” 11 No.1 No.1 : :HII-A SJR 12



Дата загрузки: 2017-04-08
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0.09/5
... Space Transportation System (STS)-104/7A in July 2001 and remains... LE-7A 2units × LE-7A × 1unit Second Stage 4m Outside Diameter 4m Second Engine LE-5B Stage LE-5B Rocket Booster SRB... first stage, powered by two LE-7A engines (H-IIA only had one... powered by a simplified, multi-restartable LE-5B LOX/LH2 engine. A new... possible for NASA, namely Thomas Q. Le, IP Element and Visiting Vehicle...



Дата загрузки: 2017-04-23
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0.07/5
... with the inflow profile in the absence of fuel... with the inflow profile, which justifies the choice... meng,1 (n) [kg] H-2-1 LE-7 1714 (1) 1800 (1) H-2A-1 LE-7A 1800 (2) H-2A LRB LE-7A 625 (1) Ariane... Centaur IIA Centaur G N1 Block R LE-5 LE-5EC LE-5B Ariane 5 ESC A HM7...-4 RL-10A-3A RD-56 LE-5 LE-5A LE-5B Vinci meng,3 (n) [kg... and basins and margins. Vol. 7A. The Pacific Ocean (Naim, A.E.M., Stehi... probably distorts the CO profile outside the observational bounds [2]. Nitrogen... [54]–[56]. The H2 O profile was fixed to match the... cyan asterisks mark the profile inferred from 1991 space telescope..., and G. LeBras, “Spectres d-absorption dans le proche ultraviolet de CS2 et... is given in Fig. 7. Fig. 7a shows that apart from a few...



Дата загрузки: 2017-05-20
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0/5
... ways from its H-II precursor, LE-5A engine. It is powered by a simplified LE-5B LOX/LH2 engine, which... kN (14 tons) of thrust. LE-5B gimbals are used to... used for attitude control. Since LE-5B is a restartable engine, multiple... core liquid-fuel engine LE-7A is modified from LE-7 engine used for... LE-7A, but with a vastly simplified manufacturing process than the problem plagued LE...



Дата загрузки: 2017-01-23
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0.26/5
.... 4 3 N o. 1 2 010 Development of Turbopump for LE-X Engine MIZUNO Tsutomu : P. E. Jp, Manager..., Aero-Engine & Space Operations The LE-X is a new cryogenic booster engine... paper reports the characteristics of LE-X engine, and baseline specifications of... and liquid hydrogen engine, the LE-5. The turbopumps adopted for this... with the LE-5A, the LE-5B, the LE-7, and then the LE-7A. IHI... into the development of the LE-X engine (1) based on a recognition of... of the exterior of the LE-X engine. Using liquid oxygen and liquid hydrogen as propellants, the LE-X engine significantly increases the impulse... bleed cycle.(2) Figure 2 illustrates the LE-X engine cycle. As combustion gas... the basic specifications for the LE-X engine and the technical features... by IHI. Fig. 1 Illustration of LE-X engine exterior Liquid hydrogen Liquid... hydrogen turbopump Combustion chamber Fig. 2 LE-X engine cycle 43 V o l . 4 3 N o . 1 2 0 10 Table 1 LE-X engine characteristics 2. Outline of research and development into the LE-X engine 2.1 Concept behind the engine... behind the development of the LE-X engine is improved reliability. The LE-X employs a simplified, more reliable engine ... a high specific impulse for the LE-X engine by taking a design approach...) main characteristics of the LE-X engine. The LE-X engine has been technically... as that of the LE-7A engine (hereinafter called LE-7A), but has a high...% lower than that of the LE-7A. The liquid oxygen turbopump (hereinafter... level as that of the LE-7A, but has a very low turbine... higher than that of the LE-7A, but its nominal turbine outlet... are the characteristics of the LE-X engine and its turbopumps. The... that are extremely 44 Unit LE-X Impulse (in vacuum) Item kN... ratio — 2.9 Expansion ratio — 37 Table 2 LE-X turbopump specifications Unit FTP OTP... of the reliability of the LE-X engine and some new technologies... the technical feasibility of the LE-X engine system. 3. Characteristics of the LE-X engine 3.1 Selecting the engine working ... and performance level required for LE-X engines. Figure 6 shows an impeller... and performance level required for LE-X engines. The authors selected hybrid... been successfully developed for the LE-7A. For the shaft seals and... been successfully applied to the LE-7A. The authors applied a high-quality... into the development of the LE-X engine, the basic specifications for... characteristics of the turbopumps. The LE-X engine is the world’s first... the technical feasibility of the LE-X engine system. — Acknowledgements — The authors... research. REFERENCES (1) K. Okita : A Study of LE-X Engine Space and Aviation technology... S. Kobayashi : Visualization and Optimization of LE-X Engine System ISTS 2009-a-04... for Integrated System Design of LE-X Engine 53rd Space science and...