Lotarev DV-2
| DV-2 | |
|---|---|
 | |
| DV-2 turbofan engine | |
| Type | Turbofan |
| National origin | Soviet Union/Czechoslovakia |
| Manufacturer | Ivchenko-Progress/PSLM |
| First run | 1987 |
| Major applications | L-59 Super Albatros (L-39MS Albatros) Hongdu L-15 Ilyushin Il-108 |
| Number built | 124[1] |
| Developed from | Ivchenko AI-25 |
The Lotarev DV-2 (or PSLM DV-2, DV: Dnepr-Váh[2]) is a two-spool turbofan engine manufactured in Považská Bystrica, Slovakia by Považské Strojárne Letecké Motory (PSLM) (former ZVL) and designed in partnership with Ivchenko Lotarev Design Bureau.[3]
Design and development
Developed from the Ivchenko AI-25 turbofan engine, ZVL was also responsible for pre-production and serial engine production.[1]
The DV-2 is a two-spool modular aviation turbofan engine with a single-stage overhung fan, two-stage LP compressor, seven-stage HP compressor, single-stage HP turbine, and two-stage LP turbine, and an annular combustion system. Maximum power at T-O is 4,850 lbf (21.58 kN) with a specific fuel consumption of 0.593 lb/hr/lbf, at Maximum Rating, Sea Level Static, ISA.[4]
One of the most unusual features of this military engine is the single stage fan; most trainer and combat engines have multi-staged fans, single stage fans normally being the preserve of civil and military transport turbofans. Ivchenko Lotarev chose a very low specific thrust (net thrust/airflow) cycle for the DV-2, so a single stage fan is sufficient to develop the desired fan pressure ratio. Even so, the pressure ratio produced is somewhat higher than that normally developed by a single stage fan. Owing to the low specific thrust, the bypass ratio for the engine is higher than normal for a military turbofan.
This engine was required to power new versions of the L-39 trainer, L-39MS and L-59. Other turbofan engine models in the DV-2 family include the DV-2A, DV‑2A.2 and DV-2S.[2]
The DV-2S was renamed "RD-35" by the Klimov under license agreement with the PSLM in 1993.[2]
Applications
- L-59 Super Albatros (L-39MS Albatros)
- Hongdu L-15
- Ilyushin Il-108
Specifications (DV-2S)
Data from PSLM website[5]
General characteristics
- Type: Two-spool low-bypass turbofan engine with a single-stage fan
- Length: 1,72 m (67.7 in)
- Width: 0.82 m (32.2 in)
- Height: 1.04 m (40.9 in)
- Diameter: Fan: 0.64 m (25.2 in)
- Dry weight: 439 kg (967.8 lb)
Components
- Compressor: Two-stage LP, seven-stage HP
- Combustors: Annular combustion system with 16 fuel injection nozzles
- Turbine: single-stage HP, two-stage LP
Performance
- Maximum thrust: 2,498 Kgf; 5,508 pounds-force (24.50 kN)
- Overall pressure ratio: 15.5
- Bypass ratio: 1.4
- Turbine inlet temperature: 1,440°K
- Specific fuel consumption: 60 kg/kN/h (0.593lb/hr/lbf)
- Thrust-to-weight ratio: 5.69
See also
- Related development
- Comparable engines
- Related lists
References
- 1 2 PSLM-DV-2 at janes.com
- 1 2 3 MOT Site:
- Letecká Atlantída (03/2013) (Slovak)
- Letecká Atlantída II (04/2013) (Slovak)
- Letecká Atlantída IV (06/2013) (Slovak)
- Letecká Atlantída V (07-08/2013) (Slovak)
- ↑ PSLM Aero-engines manufacturer
- ↑ Russia, Central/Eastern Europe and China Turbofan and Turbojet Engines
- ↑ DV-2S by PSLM
External links
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