Tumansky R-79V-300

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R-79V-300
Motor del YAK-141.jpg
The engine, divided by sections
Type Turbofan
National originSoviet Union, Russia
Manufacturer AMNTK Soyuz
First run1984
Major applications Yakovlev Yak-141
Number built26 (including 16 flight-worthy engines)

The Tumansky R-79V-300. [1] is an afterburning turbofan developed by NPO Soyuz in the Soviet Union, now AMNTK Soyuz in Russia. The R-79 is a vectored-thrust afterburning turbofan used as powerplant for the supersonic vertical takeoff/landing (VTOL) fighter aircraft Yak-41 designed by Yakovlev to replace the Yak-38 [2]

Contents

Design and development

The development of the R-79 began in the late 1970 under the direction of V.K. Kobchenko with development project designation Izdeliye 79 ('Product 79'). The design and development of the R-79V-300 was driven by the requirement of designing a power plant for a supersonic V/STOL aircraft working alongside two lift engines (RD-41). Unlike its predecessor, the thrust-vectored non-afterburning turbofan Tumansky R-27 used in the Yak-38, the R-79 single exhaust design combined with a 3-wedge ring swivel nozzle made possible an afterburner turbofan capable of operate in any nozzle position. [3]

The R-79V-300 used in the Yak-41 is a two-shaft axial-flow afterburning turbofan with counter-rotating spools to reduce weight and gyroscopic forces on the engine. The engine has a three-stage low-pressure compressor (fan) and an eleven-stage high-pressure compressor, with bleed air from after the 6th stage for roll control. Both compressors are driven by a pair of counter-rotating 2-stage turbines. However the bleed air for roll control, up to 10 kg/s taken from the core will reduce the thrust. Paired with two RD-41 (4.1 kN, 4,260 kgf) they totals a thrust in hovering mode of 20,500  kgf (45,194.8  lbf ) at ISA conditions. [4]

Ground testing, production and test flights extended from 1983 to 1991 when the Yak-141 was cancelled. [5]

Further developments

During the 1990s Soyuz developed an alternative rectangular nozzle for vector control in the pitch axis, replaced the analogue electronic engine controller with a FADEC and increased thrust. [6] Nevertheless, this improved version and a non-augmented R-79V-300 variant designated VK-21 [7] have no reported application. In the early 2000s AMNTK Soyuz developed a 30 MW gas turbine using the core and turbines of the R-79V-300 replacing the low pressure compressor and adding a 5-stage power turbine developed by JSC Kuznetsov. [8]

Variants

R-79V-300 [1] [9]
With a 3-wedge ring swivel nozzle capable of 0 – 95º vector control with full afterburner. 152 kN (34,000 lbf) thrust
R-79M (R179-300) [6]
Improved version with higher maximum thrust, FADEC and new rectangular nozzle that enable a control of ±20° in the pitch axis. 176–200 kN (40,000–45,000 lbf) thrust.
R-579SPS-300 [10]
R-579SPS-300 R579SPS-300.jpg
R-579SPS-300
Improved engine presented at 2021 MAKS.
VK-21 [7]
Proposed non-augmented version of the R-79V-300. 110.8 kN (24,900 lbf) of thrust.
GTE-30-300 [11]
Aero-derivative gas turbine with a capacity of 30MW and 33 MW peak power with a thermal efficiency of 36% developed since 2002–2003 and presented at 2005 MAKS but with little information after that. Airflow: 99.3 kg/s, Overall pressure ratio: 22.1:1.

Applications

Specifications (R-79V-300)

Data from Zrelov, Maslov, 1999; [1] Butowski, Fricker, (1995) [12]

General characteristics

Components

Performance

See also

References

  1. 1 2 3 4 Зрелов В.А, Маслов В.Г. (1999). Основные... pp. 90–91.
  2. ↑ Bill Gunston, Yefrim Gordon (1997). Yakovlev Aircraft since 1924. United Kingdom: Putnam Aeronautical Books. p. 190. ISBN   0-85177-872-0.
  3. 1 2 Bill Gunston, Yefrim Gordon (1997). Yakovlev Aircraft since 1924. United Kingdom: Putnam Aeronautical Books. p. 191. ISBN   0-85177-872-0.
  4. ↑ Piotr Butowski, John Fricker, (1995), pp. 31-32
  5. ↑ Piotr Butowski, John Fricker, (1995), pp. 31, 36
  6. 1 2 "R179-300". ANMTK Soyuz. Archived from the original on 6 Aug 2002. Retrieved 17 Aug 2008.
  7. 1 2 3 "VK-21". AMNTK Soyuz. Archived from the original on 6 Sep 2002.
  8. ↑ "урбины и дизели, СЕНТЯБРЬ-ОКТЯБРЬ 2005 (Turbines and Diesel, September-October 2005), p.46" (PDF).
  9. 1 2 3 "Авиационные двигатели [Aircraft engines]". AMNTK Soyuz. Archived from the original on 17 Aug 2008. Retrieved 17 Aug 2008.
  10. ↑ "АМНТК "Союз" представил первый российский двигатель для сверхзвукового пассажирского самолета на МАКС-2021 [AMNTK Soyuz presented the first Russian engine for a supersonic passenger aircraft at MAKS-2021]". 2021.
  11. ↑ "Газотурбинные установки [Gas turbine units]".
  12. ↑ Piotr Butowski, John Fricker (1995). Yakovlev's V/STOL Fighters... p. 31.
  13. ↑ Piotr Butowski, John Fricker (1995). Yakovlev's V/STOL Fighters... p. 35.

Further reading

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