fundamental researchittf.kiev.ua/wp-content/uploads/2016/11/fundamental.pdf · 2016. 11. 8. ·...

FUNDAMENTAL RESEARCH

PERSPECTIVE SCHEMES OF FILM COOLING OF BLADES OF HIGH PERFORMANCE GAS TURBINES

Idea: Coolant supply to the group of dimples of different configuration made on the gas turbine blade surface to decrease flow separation and minimize negative influence of vortex structures Practical favour: Increase in the film cooling efficiency 1.5…2.5 times as large in comparison with traditional schemes of holes without dimples, decrease in the coolant mass flow rate for 10…15%. Results of this study have been used in the leading gas turbine plants of Ukraine – Gas Turbine Research & Production Complex «Zorya–Mashproect» (Mykolaiv) and Zaporizhzhya Machine-Building Design Company «Ivchenko–Progress», in developing perspective high performance gas turbine engines for Navy and Air Force (implementing acts 2012…2014). Patents of Ukraine: №47749, 2004, application for patent of Ukraine №201504484, 2015

2-a, Zhelyabov str., 03057, Kyiv, Ukraine phone: (044) 456-93-02, 453-28-53, е-mail: [email protected], [email protected]

HEAT TRANSFER SURFACES FOR GAS TURBINE AND COMBINED CYCLE GAS TURBINE PLANTS

In cross flow of tubes bundle with surface dimples heat transfer enhancement is 1.3…1.7 as large along with the hydraulic losses decrease by 20% downstream offset of the separation zone.

Heat transfer enhancement is 1.3 as large in the moderate increase hydraulic losses (1.7 as large)

Application: regenerators of gas turbine engines in pipeline network of Ukraine, gas turbines for aero engines.

Patent of the Ukraine №13888, 1997

ГАЗ

2a, Zhelyabov str., 03057, Kyiv, Ukraine. Phone (044) 456-60-91; e-mail: [email protected]

2, Bulakhovskogo str., Kyiv, Ukraine, tel.: (+380 44) 424-20-26, е-mail: [email protected]

STUDY OF THE STATE OF WATER IN COLLOIDAL CAPILLARY-POROUS MATERIALS AND SOLUTIONS BY MEANS OF DSC

0 1 2 3 4 5 6 7 8 90,0

0,2

0,4

0,6

0,8

1,0

1,2

Spec

ific

cont

ent o

f bou

nd w

ater

, g/

g of

dry

solid

s

Moisture content, g/g of dry solids.

Apple Pumpkin Potato Willow wood

0 2 4 6 8 10 12 140

5

10

15

20

25

30

35

Hydr

ation

numb

er,

mole

of w

ater /

mole

of su

crose

Concentration, mole fraction, %

- A.G. Pasynsky (calculation)- V.I. Buravlova (calculation)- S.E. Kharin (calculation)- Institute of Engineering

Thermophysics of NASU (experiment)

Changes of the specific content of bound water in plant material during drying

process

Dependence of degree of hydration of the sucrose solution

on its concentration

30 35 40 45 50 550,000,050,100,150,200,250,300,350,400,450,50

Bou

nd w

ater

, g/

g og

dry

solid

s

Moisture, %

Potato starch Corn starch

Dependence of bound water content on moisture

content of starch

Apple Potato

DSC curves

U/m, В/г

0,00

0,25

0,50

0,75

1,00

1,25

1,50

1,75

2,00

-40 -35 -30 -25 -20 -15 -10 -5 0 5 10 Т,oС

84,26%75,22%66,78%58,54%51,86%43,82%36,37%

U/m, B/g U/m, В/г

0,00

0,25

0,50

0,75

1,00

1,25

1,50

-40 -35 -30 -25 -20 -15 -10 -5 0 5 10 Т,oС

82,91%73,00%65,92%59,32%46,00%38,03%29,59%

U/m, B/g

STUDY OF THERMAL AND PHYSICAL CHARACTERISTICS OF MATERIALS BY MEANS OF DSC

Range: temperature t = 10 – 90 °С moisture W = 6,8 – 90,0 % с (t,W) = 1605,3 + 26,26W + 9,27t – 0, 092Wt (kJ kg-1 К-1)

Specific heat capacity of apple

0,00 0,04 0,08 0,12 0,16 0,20-50-40-30-20-10

010203040 Sugar beet

Apple

Tg, о C

Moisture content, g / g of dry solids

Dependence of glass transition temperature in tissues of sugar beet and apple at low humidity

Tg = 34,78 – 339,8W Tg = 62,83 - 846,4W

c, kJ kg-1 K-1


DETERMINATION OF HEAT OF EVAPORATION BY MEANS OF MICROCALORIMETER DMKV-01

The changes of the heat of evaporation of water from willow shoots at different

temperatures of drying

Evaluation of convective drying curves of parenchyma tissue of apple with help of

microcalorimeter 1 – thermogram; 2 – drying curve;

3 –drying rate curve

table %/min

min

kJ kg-1


GENERAL VIEW OF THE WORK HEAT REGENERATOR

Regenerator is one of biggest components of gas turbine plant

Annual economy due to re-novation of a single Gas Turbine Pump with new gas turbine engine is 20 thousant m3 of the fuel natural gas. This can be compared with approximate cost of the proposed Gas Turbine Pump. The regenerator weight with proposed types of heat transfer surfacesis 20% less of the regenerator with smooth tubes

2-a, Zhelyabov str., 03057, Kyiv, Ukraine. Phone (044) 456-60-91; e-mail: [email protected]; [email protected]

Rod-shaped micelles Globular structure

Globular structures in the “Aerosil A-175®—Water” system: (a) photo of structure (640 times larger scale), (b) calculated configuration of particles

COMBINED MATHEMATICAL MODEL OF MOLECULAR DYNAMICS AND DISSIPATIVE PARTICLE DYNAMICS IS DEVELOPED WHICH ALLOWS

TO CALCULATE THE COLLOIDAL NANOSTRUCTURES OF HYDROPHOBIC AND HYDROPHILIC NATURE

Comparison of theory and experiment

Spherical micelles

2a, Zhelyabov str., Kyiv, Ukraine, tel. (044) 453-28-46; е-mail: [email protected]

( ) ,,...,2,1,2

2

NirFdt

rdm iji

i ==

σ−

σε

ω∆

θδ+⋅ωγ−ωπ

= ,2

24

,)(

126

121

ij

ij

ij

ij

ij

ij

ijijijijiij

ij

rrr

tm

F

ev

Scheme transmission and recording of data in the study of heat transfer through the wall construction with an additional layer of different variant insulation by the

method fastened insulation

The portable unit for investigation of heat losses

through walls and translucent constructions

1. Polystyrene foam of density 15, 25, 35 kg / m3; 2. Extruded polystyrene foam; 3. Basalt mineral wool 130 kg / m3; 4. The mineral basalt slab-PMTB 2.140 kg / m3; 5. Vermitokulitoperlitova plaster; 6. Pinohazosklo 160 kg / m3; 7.Spraying polyurethane foam.

Variants of heat insulation covers for thermomodernization of building wall

constructions by the fastened insulation method :

2, Bulakhovskogo str., Kyiv, Ukraine, tel.: (044) 456-92-72, 424-25-27, e-mail: [email protected]

Investigation of heat losses of energy efficient window design in real conditions of exploitation

Options for energy efficient windows

A single-chamber glass A double-glass

Profile of the frame Rehau Euro-design 60

Profile of the frame Rehau Euro-design 70

Profile of the frame Rehau Geneo 86

4,6 мм

Principles of selecting energy saving windows: 1) the number of cameras in the pane; 2) the emission of energy-saving coatings and films on glasses; 3) use of inert gases; 4) focus front of the house; 5) the thickness of the glass; 6) the type of remote framework; 7) the distance between glasses in the pane; 8) configuration profiles frame.


TIME CHANGES IN TEMPERATURE AND DENSITY HEAT FLOW ON EXTERNAL AND INTERNAL WALL SURFACES

Temperature of the internal surface of the wall construction; Temperature of the external surface of the wall construction; Temperature of the environment.

INSTALLATION SCHEME FOR HEAT MEASUREMENT ON THE SURFACES OF WINDOW CONSTRUCTION

THERMOPHYSICAL BASES OF INCREASE OF BUILDINGS ENERGY EFFICIENCY VELOCITY AND TEMPERATURE FIELDS

IN THE DOUBLE-GLASS

SPEED (1) AND TEMPERATURE (2) DISTRIBUTIONS ON THE THICKNESS OF THE DOUBLE-GLASS PACKET

WINDOW

HEAT FLOW DENSITY DISTRIBUTION OVER THE SURFACE OF THE PACKET

WINDOW

CHANGES OVER TIME OF HEAT FLOW DENSITIES OF EXTERNAL (TOP GRAPH) AND INTERNAL SURFACES OF

THE DOUBLE-GLASS PACKET WINDOW IN WINTER SEASON

CHANGES OVER TIME OF HEAT FLOW DENSITIES OF EXTERNAL AND INTERNAL SURFACES OF THE DOUBLE-

GLASS PACKET WINDOW IN WINTER SEASON

INFLUENCE OF THE WINDOW OPENING ON THE HEAT TRANSFER THROUGH THE FENCES

TEMPERATURE DISTRIBUTION ON THE THICKNESS OF WALLS FROM CLOSING WINDOWS IN WINTER

APPLICATION RIBBED WINDOW BOX TO REDUCE HEAT LOSSES

COMPARISON OF CALCULATION RESULTS WITH THE EXPERIMENT RESULTS

CHANGES IN TEMPERATURE AND DENSITY OF THE HEAT FLOW ON EXTERNAL AND INTERNAL SURFACES OF

FENCES

The effect of rotation of the heat flow at noon

ESTIMATION OF ENERGY POTENTIAL OF WIND FLOW IN THE ZONE OF URBAN DEVELOPMENT

THE TARGET REGION - 13 SITES BUILDINGS OF IET NAS OF UKRAINE ON THE BULAKHOVSKOGO STR. 2

H = 10 м H = 20 м H = 30 м

Fields of wind velocities U m/s at different heights West wind 5 m/s at the height of Weathervane

The specific power of the wind flow

2

3UApCP ρ= - the specific power of the wind flow


RADIATIVE-CONVECTIVE HEAT TRANSFER OF THE MUNICIPAL BUILDING IN VIEW OF SOLAR RADIATION

Field of temperatures, time 1:52 , night

Field of temperatures, time 6:00, sunrise

Field of temperatures, time 12: 14, day

W

E S

N

West wind- 3 м/s

0

10

20

30

40

148 150 152 154 156

Alfa

(W/m

^2-K

ширина Дому за координатами моделі, м

FIELD OF VELOCITIES IN LONGITUDINAL SECTION AND VALUE OF THE COEFFICIENT OF HEAT TRANSFER ON THE ROOF OF THE PASSIVE TYPE BUILDING. WEST WIND 3 M/S. THE BLUE

CURVE - 00 HOURS 00 MINUTES; RED - 12 HOURS 00 MIN

spring 2014


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