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 21.58 kN (4,850 lbf) with a specific fuel consumption of 60 kg/kN/h (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

Specifications (DV-2S)

Data from PSLM website[5]

General characteristics

Components

Performance

See also

Related development
Comparable engines
Related lists

References

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