Lotarev DV-2

Design and development

Developed from the Ivchenko AI-25 turbofan engine, ZVL was also responsible for pre-production and serial engine production.

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 with a specific fuel consumption of 60 kg/(kN h) (0.593 (lb/lbf h)), at Maximum Rating, Sea Level Static, ISA.

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.

The DV-2S was renamed "RD-35" by the Klimov under license agreement with the PSLM in 1993.

Applications

• L-59 Super Albatros (L-39MS Albatros)
• Hongdu L-15
• Ilyushin Il-108

Specifications (DV-2S)

• Width: 0.82 m (32.2 in)
• Height: 1.04 m (40.9 in)
• Bypass ratio: 1.4 |power/weight= |thrust/weight= 5.69

References

References

1. [http://www.janes.com/articles/Janes-Aero-Engines/PSLM-DV-2-Slovakia.html PSLM-DV-2] at janes.com
2. [http://www.janes.com/articles/Janes-Aero-Engines/PSLM--Povazske-Strojarne-Letecke-Motory-a-s-Slovakia.html PSLM Aero-engines manufacturer]
3. [http://www.forecastinternational.com/archive/at/ea0448.doc Russia, Central/Eastern Europe and China Turbofan and Turbojet Engines]{{dead link. (January 2018)
4. [http://www.pslm.sk/index_engl.html DV-2S by PSLM] {{webarchive. link. (2010-01-10)