Experimental Investigation of Cavitation in the Circulation Pumps With Lead and Lead-Bismuth Coolants

2012 ◽  
Author(s):  
A. V. Lvov ◽  
P. A. Bokov ◽  
A. I. Shumilkov ◽  
O. O. Novozhilova ◽  
A. V. Beznosov
Keyword(s):  
Experimental Investigation ◽  
High Temperature ◽  
Oxygen Content ◽  
Flow Rate ◽  
Solid Phase ◽  
Lead Coolant ◽  
Cavitation Performance ◽  
Lead Oxides ◽  
Flow Pressure ◽  
Subsequent Disappearance

The purpose of this paper is optimization of methods for calculating of flow parts of impeller pumps for high-temperature lead coolant, taking into account specific cavitation performance of the lead coolant [1]. The article presents the studies of cavitation performance of the high-temperature coolant. The studies were conducted in the lead coolant medium at 450–550 °C, flow rate up to 25–30 m/s and lead flow pressure from 0 to 5.0 kgf/cm2 (atm), at oxygen content in lead from 10−5–10−4 up to saturation, as well as in the presence of solid phase of lead oxides in the flow and in the experimental loop with such coolant. With a view to improving the representativeness of the research results, conditions of occurrence and characteristics of gaseous cavitation in the lead coolant flow were determined using three independent methods [2, 3]. The research showed that gas cavitation can take place in lead flows in the vane-type pumps and other components of circulation loops followed by apertures of lead flow discontinuity (bubbles, caverns, etc.), filled up with diluted gas with subsequent disappearance of these apertures of flow discontinuity. Traditional cavitation with formation and subsequent collapse of lead vapors in reactor loops with lead and lead-bismuth coolant is not possible. Cavitation performance of lead coolant is identified.

Experimental Investigation of an Inert Gas Generator for Fire Suppressing

2001 ◽  
Author(s):  
SooYong Kim ◽  
A. Slitenko
Keyword(s):  
Experimental Investigation ◽  
Gas Turbine ◽  
Mass Flow Rate ◽  
Oxygen Content ◽  
Flow Rate ◽  
Gas Turbine Engine ◽  
Inert Gas ◽  
Gas Generator ◽  
Turbine Engine ◽  
Exit Nozzle

Present study deals with experimental and theoretical performance analysis of an inert gas generator(IGG) which can be used as an effective mean to suppress the fire. The system consists of a gas turbine engine and afterburning system with injection of water, exit nozzle to produce the inert gas. It is generally known that the degree of oxygen content in the product of combustion depends on both inlet and outlet temperature of a combustor. Less the oxygen content in the combustion product higher will be the effectiveness of fire suppression. Injection of water brings additional advantages of suffocating and cooling effects which are both indespensable factors for fire suppressing. The special test rig was manufactured and experimental investigation of IGG system has been carried out. The automatic control system ensured stable operation of gas turbine engine and afterburner, water injection, fuel control and others. During the investigation the main parameters of gas turbine engine and auxiliarly systems were measured: gas temperature and pressure at gas turbine and afterburner exit, fuel flow rate, water mass flow rate, inlet air temperature, water temperature in the cooling chamber, mass flow rate, temperature and velocity of exhaust gas-steam mixture in the exit nozzle, oxygen content in the exit jet. The experimental investigation shows that developed IGG system can work very well for indoor fires but need some modifications in application to outdoor fire suppressing.

Experimental investigation of heat transfer from a circular pipe to lead coolant with controlled oxygen content

Atomic Energy ◽  
2004 ◽  
Vol 97 (5) ◽  
pp. 757-760 ◽  
Author(s):  
A. V. Beznosov ◽  
A. V. Semenov ◽  
D. V. Davydov ◽  
S. S. Pinaev ◽  
T. A. Bokova ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Oxygen Content ◽  
Circular Pipe ◽  
Lead Coolant

High‐temperature mass spectrometric study of vaporization and thermodynamics of the Cs 2 O‐B 2 O 3 system: Review and experimental investigation

2021 ◽  
Vol 35 (11) ◽  
Author(s):  
Valentina L. Stolyarova ◽  
Viktor A. Vorozhtcov ◽  
Sergey I. Lopatin ◽  
Sergey M. Shugurov ◽  
Elizaveta P. Simonenko ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
High Temperature ◽  
Mass Spectrometric Study ◽  
Mass Spectrometric ◽  
Spectrometric Study ◽  
System Review

Experimental Investigation of Effect of Tip Coolant Ejection on Internal Flow Characteristics Within a Realistic Blade Coolant Channel

2013 ◽  
Author(s):  
Jian Pu ◽  
Zhaoqing Ke ◽  
Jianhua Wang ◽  
Lei Wang ◽  
Hongde You
Keyword(s):  
Experimental Investigation ◽  
Reynolds Number ◽  
Pressure Drop ◽  
Turbine Blade ◽  
Flow Rate ◽  
Flow Characteristics ◽  
Reynolds Numbers ◽  
Flow Ratio ◽  
Lp Turbine ◽  
Mass Flow Ratio

This paper presents an experimental investigation on the characteristics of the fluid flow within an entire coolant channel of a low pressure (LP) turbine blade. The serpentine channel, which keeps realistic blade geometry, consists of three passes connected by a 180° sharp bend and a semi-round bend, 2 tip exits and 25 trailing edge exits. The mean velocity fields within several typical cross sections were captured using a particle image velocimetry (PIV) system. Pressure and flow rate at each exit were determined through the measurements of local static pressure and volume flow rate. To optimize the design of LP turbine blade coolant channels, the effect of tip ejection ratio (ER) from 180° sharp bend on the flow characteristics in the coolant channel were experimentally investigated at a series of inlet Reynolds numbers from 25,000 to 50,000. A complex flow pattern, which is different from the previous investigations conducted by a simplified square or rectangular two-pass U-channel, is exhibited from the PIV results. This experimental investigation indicated that: a) in the main flow direction, the regions of separation bubble and flow impingement increase in size with a decrease of the ER; b) the shape, intensity and position of the secondary vortices are changed by the ER; c) the mass flow ratio of each exit to inlet is not sensitive to the inlet Reynolds number; d) the increase of the ER reduces the mass flow ratio through each trailing edge exit to the extent of about 23–28% of the ER = 0 reference under the condition that the tip exit located at 180° bend is full open; e) the pressure drop through the entire coolant channel decreases with an increase in the ER and inlet Reynolds number, and a reduction about 35–40% of the non-dimensional pressure drop is observed at different inlet Reynolds numbers, under the condition that the tip exit located at 180° bend is full open.

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